Revert "Add new GBM_BO_IMPORT_FD_PLANAR"

This reverts commit bb19d6abec19015eb16fe33d3a4128194f8c7f2f.

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: I0d88f7731e9e90fffee1485056d787430eb0b850
Reviewed-on: https://chromium-review.googlesource.com/395727
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/drv.h b/drv.h
index dbede51..cc7752a 100644
--- a/drv.h
+++ b/drv.h
@@ -135,7 +135,6 @@
 	uint32_t strides[DRV_MAX_PLANES];
 	uint32_t offsets[DRV_MAX_PLANES];
 	uint32_t sizes[DRV_MAX_PLANES];
-	uint64_t format_modifiers[DRV_MAX_PLANES];
 	uint32_t width;
 	uint32_t height;
 	drv_format_t format;
@@ -215,3 +214,4 @@
 #endif
 
 #endif
+