Remove redundant header file from vp9_idct.h

Change-Id: Id92544762e7b96d3c729dfc8e04ecff91cbcc7f9

vp9/common/vp9_idct.h

@@ -14,7 +14,6 @@
 #include <assert.h>
 
 #include "./vpx_config.h"
-#include "vpx/vpx_integer.h"
 #include "vp9/common/vp9_common.h"
 #include "vp9/common/vp9_enums.h"
 
@@ -22,7 +21,6 @@
 extern "C" {
 #endif
 
-
 // Constants and Macros used by all idct/dct functions
 #define DCT_CONST_BITS 14
 #define DCT_CONST_ROUNDING  (1 << (DCT_CONST_BITS - 1))