Remove reference to the deprecated and disabled Typo issue

Metalava no longer looks for common typos. It relies on the code
analyzers that run on Gerrit to detect them.

Bug: 294300564
Bug: 288072162
Test: TH
(cherry picked from https://android-review.googlesource.com/q/commit:43649f1d9b36249dcfe5ecd2d0e11a4cbf88cf65)
Merged-In: I489093568adaf15328d065a58241de4b3d9dab77
Change-Id: I489093568adaf15328d065a58241de4b3d9dab77