Revert "Add tokens for EGL_EXT_image_dma_buf_import_modifiers"

This reverts commit 1c20cd090b0f32605bb7d4b5bccbca4f32e5eb86.

This was chumped w/out explanation, and the bots have all been
dead since due to graphics_Gbm check failures.  Reverting in
the hope it'll fix things.  It can reland via the CQ.

BUG=chromium:654245

Change-Id: Ia8e60e66b7a17f56e58d58d681938139aa7a06cc
Reviewed-on: https://chromium-review.googlesource.com/395906
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/include/EGL/eglext.h b/include/EGL/eglext.h
index 3332e7f..59649a1 100644
--- a/include/EGL/eglext.h
+++ b/include/EGL/eglext.h
@@ -520,21 +520,6 @@
 #define EGL_YUV_CHROMA_SITING_0_5_EXT     0x3285
 #endif /* EGL_EXT_image_dma_buf_import */
 
-#ifndef EGL_EXT_image_dma_buf_import_modifiers
-#define EGL_EXT_image_dma_buf_import_modifiers
-#define EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT 0x3443
-#define EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT 0x3444
-#define EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT 0x3445
-#define EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT 0x3446
-#define EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT 0x3447
-#define EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT 0x3448
-#define EGL_DMA_BUF_PLANE3_FD_EXT          0x3440
-#define EGL_DMA_BUF_PLANE3_OFFSET_EXT      0x3441
-#define EGL_DMA_BUF_PLANE3_PITCH_EXT       0x3442
-#define EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT 0x3449
-#define EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT 0x344A
-#endif /* EGL_EXT_image_dma_buf_import_modifiers */
-
 #ifndef EGL_EXT_multiview_window
 #define EGL_EXT_multiview_window 1
 #define EGL_MULTIVIEW_VIEW_COUNT_EXT      0x3134