Remove keychain name param #777

Job	Run time
spm-build-test (macos-latest, macosx)	1m 32s
pod-lib-lint (macos-13, GoogleSignIn.podspec, --use-static-frameworks)	9m 47s
pod-lib-lint (macos-13, GoogleSignIn.podspec)	15m 17s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec)	11m 16s
spm-build-test (macos-latest, iphonesimulator)	1m 29s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec, --use-static-frameworks)	15m 3s
	54m 24s

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