Revert "Revert "Remove desugar support""

This reverts commit 7576916efc.

Reason for revert: includes art veridex fix this time

Change-Id: Ia8da00b5ec8ed3dc3ce2a2521f0a7b2b2b131960

android/config.go

@@ -627,10 +627,6 @@ func (c *config) Android64() bool {
 	return false
 }
 
-func (c *config) UseD8Desugar() bool {
-	return !c.IsEnvFalse("USE_D8_DESUGAR")
-}
-
 func (c *config) UseGoma() bool {
 	return Bool(c.productVariables.UseGoma)
 }