Trade off fast inter search speed feature

For speed = 4, 5, and 8 presets, BD-rate impact is seen as -0.91%,
-0.82%, and -0.67% (as per AWCY runs) with encode time increment
of 5.05%, 6.05%, and 6.56% (averaged across multiple test cases).

STATS_CHANGED

Change-Id: Ia9970067dc5fd24e692573539c264e385965dab8
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index f9de1a2..e97a405 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -342,7 +342,6 @@
     sf->use_intra_txb_hash = 0;
     sf->use_mb_rd_hash = 0;
     sf->tx_type_search.fast_intra_tx_type_search = 1;
-    sf->tx_type_search.fast_inter_tx_type_search = 1;
     sf->use_square_partition_only_threshold =
         boosted ? BLOCK_128X128 : BLOCK_4X4;
     sf->tx_size_search_method =