Remove temporary coeff_is_byte_flag in txb code

Change-Id: I8b3e028b3c17660b390ce9c65b3d31aabc83efd9
diff --git a/av1/decoder/decodetxb.c b/av1/decoder/decodetxb.c
index 12bf9f1..3f1b186 100644
--- a/av1/decoder/decodetxb.c
+++ b/av1/decoder/decodetxb.c
@@ -159,7 +159,7 @@
   for (int i = 0; i < *eob; ++i) {
     c = *eob - 1 - i;
     int is_nz;
-    int coeff_ctx = get_nz_map_ctx(levels, c, scan, bwl, height, tx_type, 1);
+    int coeff_ctx = get_nz_map_ctx(levels, c, scan, bwl, height, tx_type);
 
     if (c < *eob - 1) {
       is_nz = av1_read_record_bin(