Remove unused source file (#5639)

Author: paulb777

FirebaseRemoteConfig.podspec

@@ -28,7 +28,6 @@ app update.
 
   base_dir = "FirebaseRemoteConfig/Sources/"
   s.source_files = base_dir + '**/*.[mh]'
-  s.requires_arc = base_dir + '*.m'
   s.public_header_files = base_dir + 'Public/*.h'
   s.private_header_files = base_dir + 'Private/*.h'
   s.pod_target_xcconfig = {
@@ -44,7 +43,6 @@ app update.
   s.dependency 'FirebaseInstallations', '~> 1.1'
   s.dependency 'GoogleUtilities/Environment', '~> 6.2'
   s.dependency 'GoogleUtilities/NSData+zlib', '~> 6.2'
-  s.dependency 'Protobuf', '~> 3.9', '>= 3.9.2'
 
   s.test_spec 'unit' do |unit_tests|
     # TODO(dmandar) - Update or delete the commented files.

FirebaseRemoteConfig/CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 - [changed] Updated `fetchAndActivateWithCompletionHandler:` implementation to activate asynchronously. (#5617)
+- [fixed] Remove undefined class via removing unused proto generated source files. (#4334)
 
 # v4.4.11
 - [fixed] Fixed a bug where settings updates weren't applied before fetches. (#4740)