gralloc: Remove P010_UBWC local define.

Remove the redundant definition of COLOR_FMT_P010_UBWC
from gralloc utils.

CRs-Fixed: 2431404
Change-Id: I5fd9781e14dea49323ee544b6610b5b162e17537
diff --git a/gralloc/gr_utils.cpp b/gralloc/gr_utils.cpp
index e7f7ba8..0b499c3 100644
--- a/gralloc/gr_utils.cpp
+++ b/gralloc/gr_utils.cpp
@@ -35,10 +35,6 @@
 
 #define ASTC_BLOCK_SIZE 16
 
-#ifndef COLOR_FMT_P010_UBWC
-#define COLOR_FMT_P010_UBWC 9
-#endif
-
 namespace gralloc {
 
 bool IsYuvFormat(int format) {