Bug 1827664 - Remove custom changes for MSVC in libvpx r=padenot

Gecko doesn't support msvc anymore.

Differential Revision: https://phabricator.services.mozilla.com/D177518

media/libvpx/bug1137614.patch

@@ -1,23 +0,0 @@
-diff --git a/vp8/encoder/block.h b/vp8/encoder/block.h
---- a/vp8/encoder/block.h
-+++ b/vp8/encoder/block.h
-@@ -87,17 +87,18 @@ typedef struct macroblock {
-   int rddiv;
-   int rdmult;
-   unsigned int *mb_activity_ptr;
-   int *mb_norm_activity_ptr;
-   signed int act_zbin_adj;
-   signed int last_act_zbin_adj;
-
-   int *mvcost[2];
--  int *mvsadcost[2];
-+  /* MSVC generates code that thinks this is 16-byte aligned */
-+  DECLARE_ALIGNED(16, int*, mvsadcost[2]);
-   int (*mbmode_cost)[MB_MODE_COUNT];
-   int (*intra_uv_mode_cost)[MB_MODE_COUNT];
-   int (*bmode_costs)[10][10];
-   int *inter_bmode_costs;
-   int (*token_costs)[COEF_BANDS][PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS];
-
-   /* These define limits to motion vector components to prevent
-    * them from extending outside the UMV borders.

media/libvpx/moz.yaml

@@ -53,7 +53,6 @@ vendoring:
     - tools/
 
   patches:
-    - bug1137614.patch
     - input_frame_validation.patch
     - input_frame_validation_vp9.patch