Remove av1_use_hp_mv()

It always returns true since the related misc_fix[1] was merged.

[1] 23e83574b6a5105bdc686c49f2d5909f33ea721f

Change-Id: Ie3af685572a2f0a42d2b9fb9903c1abeea225dfd
diff --git a/av1/encoder/mcomp.c b/av1/encoder/mcomp.c
index 3fbceab..4b54a2c 100644
--- a/av1/encoder/mcomp.c
+++ b/av1/encoder/mcomp.c
@@ -424,7 +424,7 @@
   tr = br;
   tc = bc;
 
-  if (allow_hp && av1_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && forced_stop == 0) {
     hstep >>= 1;
     FIRST_LEVEL_CHECKS;
     if (eighthiters > 1) {
@@ -484,7 +484,7 @@
     }
   }
 
-  if (allow_hp && av1_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && forced_stop == 0) {
     tr = br;
     tc = bc;
     hstep >>= 1;
@@ -572,7 +572,7 @@
     tc = bc;
   }
 
-  if (allow_hp && av1_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && forced_stop == 0) {
     hstep >>= 1;
     FIRST_LEVEL_CHECKS;
     if (eighthiters > 1) {
@@ -687,7 +687,7 @@
   unsigned int cost_array[5];
   int kr, kc;
 
-  if (!(allow_hp && av1_use_mv_hp(ref_mv)))
+  if (!allow_hp)
     if (round == 3) round = 2;
 
   bestmv->row *= 8;
@@ -2446,7 +2446,7 @@
     tc = bc;
   }
 
-  if (allow_hp && av1_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && forced_stop == 0) {
     hstep >>= 1;
     FIRST_LEVEL_CHECKS;
     if (eighthiters > 1) {
@@ -2581,7 +2581,7 @@
   y_stride = pd->pre[is_second].stride;
   offset = bestmv->row * y_stride + bestmv->col;
 
-  if (!(allow_hp && av1_use_mv_hp(ref_mv)))
+  if (!allow_hp)
     if (round == 3) round = 2;
 
   bestmv->row *= 8;
@@ -3083,7 +3083,7 @@
   y_stride = pd->pre[is_second].stride;
   offset = bestmv->row * y_stride + bestmv->col;
 
-  if (!(allow_hp && av1_use_mv_hp(ref_mv)))
+  if (!allow_hp)
     if (round == 3) round = 2;
 
   bestmv->row *= 8;