[Auth] Revert reCAPTCHA integration PRs (#11617)

Reverted reCAPTCHA <-> Auth integration PRs (#11231, #11606, #11609, #11610) due to an issue with the zip build.

Author: andrewheard

CoreOnly/NOTICES

@@ -2178,210 +2178,6 @@ More information at <a href="http://landonf.org/2009/02/index.html">Landon
 Fuller's blog</a>
 
 
-RecaptchaInterop
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 SwiftProtobuf
                                  Apache License
                            Version 2.0, January 2004

FirebaseAuth.podspec

@@ -57,7 +57,7 @@ supports email and password accounts, as well as several 3rd party authenticatio
   s.dependency 'GoogleUtilities/AppDelegateSwizzler', '~> 7.8'
   s.dependency 'GoogleUtilities/Environment', '~> 7.8'
   s.dependency 'GTMSessionFetcher/Core', '>= 2.1', '< 4.0'
-  s.ios.dependency 'RecaptchaInterop', '~> 18.2.0'
+
   s.test_spec 'unit' do |unit_tests|
     unit_tests.scheme = { :code_coverage => true }
     # Unit tests can't run on watchOS.

FirebaseAuth/CHANGELOG.md

@@ -1,5 +1,4 @@
 # 10.13.0
-- [added] Added reCAPTCHA verification support in email authentication flows. (#11231)
 - [fixed] Fixed a compilation error regression introduced in 10.12.0 building iOS App Extensions. (#11537)
 
 # 10.12.0