Some of the tests had bitrotted, and others no longer worked
because they used frameworks such as CoreAudio that are not
available in the public SDK for watchOS.
Swift SVN r32733
get the same wording, fixing <rdar://problem/21964599> Different diagnostics for the same issue
While I'm in the area, remove some dead code.
Swift SVN r30713
GLKVector2 doesn't have 'r' or 'g' components, unlike the longer vector types, and GLKQuaternion has 'x', 'y', 'z', and 'w' components. Thanks Jordan for pointing these out.
Swift SVN r23895