Remove hwc_header_remove_layer_alpha.patch

Landed on platform/hardware/libhardware[b2g_ics_1.2]

Change-Id: I865b83c69daf8198095d1a51eb9d12702b856b54

patch/ics_strawberry/hardware/libhardware/hwc_header_remove_layer_alpha.patch

-diff --git a/include/hardware/hwcomposer.h b/include/hardware/hwcomposer.h
-index 1b77733..d53269f 100644
---- a/include/hardware/hwcomposer.h
-+++ b/include/hardware/hwcomposer.h
-@@ -169,9 +169,6 @@ typedef struct hwc_layer {
-     /* blending to apply during composition */
-     int32_t blending;
- 
--    /* alpha value of the layer */
--    int32_t alpha;
--
-     /* area of the source to consider, the origin is the top-left corner of
-      * the buffer */
-     hwc_rect_t sourceCrop;