Remove keychain name param #783

Job	Run time
spm-build-test (macos-latest, macosx)	2m 11s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec)	11m 55s
pod-lib-lint (macos-13, GoogleSignIn.podspec, --use-static-frameworks)	7m 21s
pod-lib-lint (macos-13, GoogleSignIn.podspec)	15m 36s
spm-build-test (macos-latest, iphonesimulator)	3m 18s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec, --use-static-frameworks)	11m 57s
	52m 18s

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