Revert "Check for duplicative Flutter.framework emeddings when building for Xcode 10" (#26339)

* Revert "Check for duplicative Flutter.framework emeddings when building for Xcode 10 (#23188)"

packages/flutter_tools/bin/xcode_backend.sh

diff --git a/packages/flutter_tools/bin/xcode_backend.sh b/packages/flutter_tools/bin/xcode_backend.sh
index 7b7678a..59d0bc8 100755
--- a/packages/flutter_tools/bin/xcode_backend.sh
+++ b/packages/flutter_tools/bin/xcode_backend.sh
@@ -35,32 +35,7 @@
   return 0
 }
 
-# Check if the project.pbxproj file will end up embedding Flutter.framework multiple
-# times (once for Cocoapods and once from the template).  This will cause cryptic 
-# build errors in Xcode 10, and we don't have a good way to remedy it without
-# potentially damaging the project configuration.
-ValidateFlutterFrameworkXcode10() {
-  # Bail out if we're below Xcode 10
-  if [[ "Xcode 9.9.9" != "$(printf "$(xcodebuild -version | head -n1 )\nXcode 9.9.9" | sort -V | head -n1)" ]]; then
-    return 0
-  fi
-
-  local pbxproj="${PROJECT_FILE_PATH}/project.pbxproj"
-  AssertExists ${pbxproj}
-
-  if grep -q "\"\${PODS_ROOT}\/\.\.\/Flutter\/engine\/Flutter\.framework\"" ${pbxproj} && 
-     grep -q "/\* Flutter\.framework in Embed Frameworks \*/" ${pbxproj}; then
-    EchoError "\"${pbxproj}\" attempts to embed Flutter.framework\
-in multiple places (once in 'EmbedFrameworks' and once from Cocapods). \
-This configuration is not supported in the Xcode 10 build system. \
-To resolve this issue, remove Flutter.framework from the 'Embed Frameworks' phase."
-    exit -1
-  fi
-}
-
 BuildApp() {
-  ValidateFlutterFrameworkXcode10
-  
   local project_path="${SOURCE_ROOT}/.."
   if [[ -n "$FLUTTER_APPLICATION_PATH" ]]; then
     project_path="${FLUTTER_APPLICATION_PATH}"