Remove unused variable (#2352)

packages/google_sign_in/google_sign_in/CHANGELOG.md

diff --git a/packages/google_sign_in/google_sign_in/CHANGELOG.md b/packages/google_sign_in/google_sign_in/CHANGELOG.md
index c3dab06..b5d7d8f 100644
--- a/packages/google_sign_in/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.1.5
+
+* Remove unused variable.
+
 ## 4.1.4
 
 * Make the pedantic dev_dependency explicit.

packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m

diff --git a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
index dff3481..0790c1b 100644
--- a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
+++ b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
@@ -138,7 +138,6 @@
 }
 
 - (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary *)options {
-  NSString *sourceApplication = options[UIApplicationOpenURLOptionsSourceApplicationKey];
   return [[GIDSignIn sharedInstance] handleURL:url];
 }
 

packages/google_sign_in/google_sign_in/pubspec.yaml

diff --git a/packages/google_sign_in/google_sign_in/pubspec.yaml b/packages/google_sign_in/google_sign_in/pubspec.yaml
index 70363f0..99cdef9 100644
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in/google_sign_in
-version: 4.1.4
+version: 4.1.5
 
 flutter:
   plugin: