Enable -Wconversion for RenderArea.

Bug: 129481165
Test: make; atest libsurfaceflinger_unittest
Change-Id: I9631fc94f99de2936a44660969b55c2fb055f738
diff --git a/services/surfaceflinger/RenderArea.cpp b/services/surfaceflinger/RenderArea.cpp
index 9a6c853..5fea521 100644
--- a/services/surfaceflinger/RenderArea.cpp
+++ b/services/surfaceflinger/RenderArea.cpp
@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wconversion"
-
 #include "RenderArea.h"
 
 namespace android {
@@ -33,6 +29,3 @@
 }
 
 } // namespace android
-
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic pop // ignored "-Wconversion"