Remove blank line in av1_encode_tiles_row_mt()

Change-Id: I97d91caf5de6767b2812ab5ca406b434a1986270
(cherry picked from commit ea9a06fd1a6bf5c9c6ff71b1737b1bed99f1ac6d)

av1/encoder/ethread.c

diff --git a/av1/encoder/ethread.c b/av1/encoder/ethread.c
index 209636d..4127c9a 100644
--- a/av1/encoder/ethread.c
+++ b/av1/encoder/ethread.c
@@ -1706,7 +1706,6 @@
   }
 
   num_workers = AOMMIN(num_workers, mt_info->num_workers);
-
   lpf_pipeline_mt_init(cpi, num_workers);
 
   av1_init_tile_data(cpi);