Disabled x86inc style assembly functions.... part 2

Missed a file

Change-Id: I33179de6755bc9eda9ad906e4fec6902ace435a5
diff --git a/vp9/vp9dx.mk b/vp9/vp9dx.mk
index f382dc6..868bbed 100644
--- a/vp9/vp9dx.mk
+++ b/vp9/vp9dx.mk
@@ -34,7 +34,6 @@
 
 VP9_DX_SRCS-yes := $(filter-out $(VP9_DX_SRCS_REMOVE-yes),$(VP9_DX_SRCS-yes))
 
-VP9_DX_SRCS-$(ARCH_X86)$(ARCH_X86_64) += decoder/x86/vp9_x86_dsystemdependent.c
 VP9_DX_SRCS-$(HAVE_SSE2) += decoder/x86/vp9_idct_blk_sse2.c
 
 $(eval $(call asm_offsets_template,\