[codesign] Use Cocoon analysis_options.yaml (#2158)

diff --git a/codesign/analysis_options.yaml b/codesign/analysis_options.yaml
index 2160798..5e2133e 100644
--- a/codesign/analysis_options.yaml
+++ b/codesign/analysis_options.yaml
@@ -1,153 +1 @@
 include: ../analysis_options.yaml
-
-linter:
-  rules:
-    # these rules are documented on and in the same order as
-    # the Dart Lint rules page to make maintenance easier
-    # https://github.com/dart-lang/linter/blob/master/example/all.yaml
-    always_declare_return_types: true
-    always_put_control_body_on_new_line: true
-    # - always_put_required_named_parameters_first # we prefer having parameters in the same order as fields https://github.com/flutter/flutter/issues/10219
-    always_require_non_null_named_parameters: true
-    always_specify_types: true
-    annotate_overrides: true
-    # - avoid_annotating_with_dynamic # conflicts with always_specify_types
-    # - avoid_as # incompatible with implicit-casts: false
-    avoid_bool_literals_in_conditional_expressions: true
-    # - avoid_catches_without_on_clauses # we do this commonly
-    # - avoid_catching_errors # we do this commonly
-    avoid_classes_with_only_static_members: true
-    # - avoid_double_and_int_checks # only useful when targeting JS runtime
-    avoid_empty_else: true
-    avoid_field_initializers_in_const_classes: true
-    avoid_function_literals_in_foreach_calls: true
-    # - avoid_implementing_value_types # not yet tested
-    avoid_init_to_null: true
-    # - avoid_js_rounded_ints # only useful when targeting JS runtime
-    avoid_null_checks_in_equality_operators: true
-    # - avoid_positional_boolean_parameters # not yet tested
-    # - avoid_private_typedef_functions # we prefer having typedef (discussion in https://github.com/flutter/flutter/pull/16356) avoid_relative_lib_imports: true
-    avoid_renaming_method_parameters: true
-    avoid_return_types_on_setters: true
-    # - avoid_returning_null # there are plenty of valid reasons to return null
-    # - avoid_returning_null_for_future # not yet tested
-    avoid_returning_null_for_void: true
-    # - avoid_returning_this # there are plenty of valid reasons to return this
-    # - avoid_setters_without_getters # not yet tested
-    # - avoid_shadowing_type_parameters # not yet tested
-    # - avoid_single_cascade_in_expression_statements # not yet tested
-    avoid_slow_async_io: true
-    avoid_types_as_parameter_names: true
-    # - avoid_types_on_closure_parameters # conflicts with always_specify_types
-    avoid_unused_constructor_parameters: true
-    avoid_void_async: true
-    await_only_futures: true
-    camel_case_types: true
-    cancel_subscriptions: true
-    # - cascade_invocations # not yet tested
-    # - close_sinks # not reliable enough
-    # - comment_references # blocked on https://github.com/flutter/flutter/issues/20765
-    # - constant_identifier_names # needs an opt-out https://github.com/dart-lang/linter/issues/204
-    control_flow_in_finally: true
-    curly_braces_in_flow_control_structures: true
-    # - diagnostic_describe_all_properties # not yet tested
-    directives_ordering: true
-    empty_catches: true
-    empty_constructor_bodies: true
-    empty_statements: true
-    # - file_names # not yet tested
-    flutter_style_todos: true
-    hash_and_equals: true
-    implementation_imports: true
-    # - invariant_booleans # too many false positives: https://github.com/dart-lang/linter/issues/811
-    iterable_contains_unrelated_type: true
-    # - join_return_with_assignment # not yet tested
-    library_names: true
-    library_prefixes: true
-    # - lines_longer_than_80_chars # not yet tested
-    list_remove_unrelated_type: true
-    # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
-    no_adjacent_strings_in_list: true
-    no_duplicate_case_values: true
-    non_constant_identifier_names: true
-    # - null_closures  # not yet tested
-    # - omit_local_variable_types # opposite of always_specify_types
-    # - one_member_abstracts # too many false positives
-    # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
-    overridden_fields: true
-    package_api_docs: true
-    package_names: true
-    package_prefixed_library_names: true
-    # - parameter_assignments # we do this commonly
-    prefer_adjacent_string_concatenation: true
-    prefer_asserts_in_initializer_lists: true
-    # - prefer_asserts_with_message # not yet tested
-    prefer_collection_literals: true
-    prefer_conditional_assignment: true
-    prefer_const_constructors: true
-    prefer_const_constructors_in_immutables: true
-    prefer_const_declarations: true
-    prefer_const_literals_to_create_immutables: true
-    # - prefer_constructors_over_static_methods # not yet tested
-    prefer_contains: true
-    # - prefer_double_quotes # opposite of prefer_single_quotes
-    prefer_equal_for_default_values: true
-    # - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
-    prefer_final_fields: true
-    # - prefer_final_in_for_each # not yet tested
-    prefer_final_locals: true
-    # - prefer_for_elements_to_map_fromIterable # not yet tested
-    prefer_foreach: true
-    # - prefer_function_declarations_over_variables # not yet tested
-    prefer_generic_function_type_aliases: true
-    # - prefer_if_elements_to_conditional_expressions # not yet tested
-    prefer_if_null_operators: true
-    prefer_initializing_formals: true
-    prefer_inlined_adds: true
-    # - prefer_int_literals # not yet tested
-    # - prefer_interpolation_to_compose_strings # not yet tested
-    prefer_is_empty: true
-    prefer_is_not_empty: true
-    prefer_iterable_whereType: true
-    # - prefer_mixin # https://github.com/dart-lang/language/issues/32
-    # - prefer_null_aware_operators # disable until NNBD, see https://github.com/flutter/flutter/pull/32711#issuecomment-492930932
-    prefer_relative_imports: true
-    prefer_single_quotes: true
-    prefer_spread_collections: true
-    prefer_typing_uninitialized_variables: true
-    prefer_void_to_null: true
-    # - provide_deprecation_message # not yet tested
-    # - public_member_api_docs # enabled on a case-by-case basis; see e.g. packages/analysis_options.yaml
-    recursive_getters: true
-    slash_for_doc_comments: true
-    # - sort_child_properties_last # not yet tested
-    sort_constructors_first: true
-    sort_pub_dependencies: true
-    sort_unnamed_constructors_first: true
-    test_types_in_equals: true
-    throw_in_finally: true
-    # - type_annotate_public_apis # subset of always_specify_types
-    type_init_formals: true
-    unawaited_futures: true
-    # - unnecessary_await_in_return # not yet tested
-    unnecessary_brace_in_string_interps: true
-    unnecessary_const: true
-    unnecessary_getters_setters: true
-    # - unnecessary_lambdas # has false positives: https://github.com/dart-lang/linter/issues/498
-    unnecessary_new: true
-    unnecessary_null_aware_assignments: true
-    unnecessary_null_in_if_null_operators: true
-    unnecessary_overrides: true
-    unnecessary_parenthesis: true
-    unnecessary_statements: true
-    unnecessary_this: true
-    unrelated_type_equality_checks: true
-    # - unsafe_html # not yet tested
-    use_full_hex_values_for_flutter_colors: true
-    # - use_function_type_syntax_for_parameters # not yet tested
-    use_rethrow_when_possible: true
-    # - use_setters_to_change_properties # not yet tested
-    # - use_string_buffers # has false positives: https://github.com/dart-lang/sdk/issues/34182
-    # - use_to_and_as_if_applicable # has false positives, so we prefer to catch this by code-review
-    valid_regexps: true
-    # - void_checks # not yet tested