Addressed comments by bzbarsky-apple part3 unused options #74

Job	Run time
Run framework tests (asan, -enableAddressSanitizer YES -enableUndefinedBehaviorSanitizer YES)	20m 22s
Build TV Casting Bridge example	14m 5s
Run framework tests (asan-global-storage, -enableAddressSanitizer YES -enableUndefinedBehaviorSan...	17m 42s
Build framework (macos-release-availability, -sdk macosx -configuration Release OTHER_CFLAGS='$...	12m 19s
Run framework tests (tsan, -enableThreadSanitizer YES)	27m 59s
Build framework (ios-release, -sdk iphoneos -configuration Release OTHER_CFLAGS='${inherited} -We...	16m 30s
Build framework (ios-debug, -sdk iphoneos -configuration Debug OTHER_CFLAGS='${inherited} -Werr...	8m 12s
Build framework (tvos-debug, -sdk appletvos -configuration Debug OTHER_CFLAGS='${inherited} -Wer...	11m 50s
Build framework (watchos-debug, -sdk watchos -configuration Debug OTHER_CFLAGS='${inherited} -...	10m 36s
Build Darwin	0s
	2h 19m 35s

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