Revert "Add developer setting to set the default GPU renderer."

This reverts commit f91b036177326b65518402ada527f5348e2a18c4.

Test: compile only
Reason for revert: removing the option from the developer settings UI

Change-Id: I8ce6d6e07e3495e973f9020b4f4f16f8c2075788
4 files changed