Remove fuchsia_precache from adhoc tests.

This is part of the deprecation of adhoc tests.

Bug: https://github.com/flutter/flutter/issues/139153
Change-Id: Icc55b9bd7f939ff86b16f19aee3092b67bfcad5a
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/52760
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
Reviewed-by: Yusuf Mohsinally <mohsinally@google.com>
diff --git a/recipe_modules/adhoc_validation/api.py b/recipe_modules/adhoc_validation/api.py
index 5624b66..5ea5ad4 100644
--- a/recipe_modules/adhoc_validation/api.py
+++ b/recipe_modules/adhoc_validation/api.py
@@ -16,9 +16,7 @@
 
   def available_validations(self):
     """Returns the list of accepted validations."""
-    return [
-        'docs', 'fuchsia_precache', 'verify_binaries_codesigned', 'docs_deploy'
-    ]
+    return ['docs', 'verify_binaries_codesigned', 'docs_deploy']
 
   def run(self, name, validation, env, env_prefixes, secrets=None):
     """Runs a validation as a recipe step.
diff --git a/recipe_modules/adhoc_validation/examples/full.expected/invalid_validation.json b/recipe_modules/adhoc_validation/examples/full.expected/invalid_validation.json
index 3dcf8e6..2d448d6 100644
--- a/recipe_modules/adhoc_validation/examples/full.expected/invalid_validation.json
+++ b/recipe_modules/adhoc_validation/examples/full.expected/invalid_validation.json
@@ -19,7 +19,7 @@
       "Traceback (most recent call last):",
       "  File \"RECIPE_REPO[flutter]/recipe_modules/adhoc_validation/examples/full.py\", line 26, in RunSteps",
       "    api.adhoc_validation.run('Docs', validation, {}, {})",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/adhoc_validation/api.py\", line 36, in run",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/adhoc_validation/api.py\", line 34, in run",
       "    raise AssertionError(msg)",
       "AssertionError('invalid is not listed in available_validations.')"
     ]
diff --git a/recipe_modules/adhoc_validation/resources/fuchsia_precache.sh b/recipe_modules/adhoc_validation/resources/fuchsia_precache.sh
deleted file mode 100644
index 337ea72..0000000
--- a/recipe_modules/adhoc_validation/resources/fuchsia_precache.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-#
-# Validates flutter tool can succesfully download fuchsia
-# artifacts.
-#
-set -e
-
-flutter config --enable-fuchsia
-flutter precache --fuchsia --no-android --no-ios --force
-flutter precache --flutter_runner --no-android --no-ios --force