Revert "hwc: Fallback to GPU for video playback usecase"

This reverts commit e217fbfb09b0ead3689d542da3ad651fc6c4f5c7.
diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index c132f16..ab5b144 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -80,7 +80,6 @@
 
     //Prepare is called after a vsync, so unlock previous buffers here.
     ctx->qbuf->unlockAllPrevious();
-    return 0;
 
     for (uint32_t i = 0; i <numDisplays; i++) {
         hwc_display_contents_1_t* list = displays[i];