Remove CONFIG_FILTER_INTRA flag

Change-Id: If6eb2e277dfc3785516509069bcbc546ad943264
diff --git a/av1/common/av1_rtcd_defs.pl b/av1/common/av1_rtcd_defs.pl
index aa8dc47..8012140 100755
--- a/av1/common/av1_rtcd_defs.pl
+++ b/av1/common/av1_rtcd_defs.pl
@@ -162,10 +162,8 @@
 
 
 # FILTER_INTRA predictor functions
-if (aom_config("CONFIG_FILTER_INTRA") eq "yes") {
-  add_proto qw/void av1_filter_intra_predictor/, "uint8_t *dst, ptrdiff_t stride, TX_SIZE tx_size, const uint8_t *above, const uint8_t *left, int mode";
-  specialize qw/av1_filter_intra_predictor sse4_1/;
-}
+add_proto qw/void av1_filter_intra_predictor/, "uint8_t *dst, ptrdiff_t stride, TX_SIZE tx_size, const uint8_t *above, const uint8_t *left, int mode";
+specialize qw/av1_filter_intra_predictor sse4_1/;
 
 # High bitdepth functions