Revert "skia: Add workaround for gcc 4.8 bug #54781"

Summary: This reverts commit 3fe72c6e4d066ea0641d0acea293e462f4aefc78.

Test Plan: Verify this is indeed unnecessary on our current GCC

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D596