restoration.c: make av1_loop_restoration_copy_planes static

This function is unused outside of this file.

Bug: aomedia:3416
Change-Id: I67c46aeaa813de0590cf0ecbf676346f512c7338
diff --git a/av1/common/restoration.c b/av1/common/restoration.c
index 8aaddef..9d38f2f 100644
--- a/av1/common/restoration.c
+++ b/av1/common/restoration.c
@@ -1123,8 +1123,8 @@
   }
 }
 
-void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt,
-                                      AV1_COMMON *cm, int num_planes) {
+static void loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt,
+                                         AV1_COMMON *cm, int num_planes) {
   typedef void (*copy_fun)(const YV12_BUFFER_CONFIG *src_ybc,
                            YV12_BUFFER_CONFIG *dst_ybc, int hstart, int hend,
                            int vstart, int vend);
@@ -1207,7 +1207,7 @@
 
   foreach_rest_unit_in_planes(loop_rest_ctxt, cm, num_planes);
 
-  av1_loop_restoration_copy_planes(loop_rest_ctxt, cm, num_planes);
+  loop_restoration_copy_planes(loop_rest_ctxt, cm, num_planes);
 }
 
 void av1_foreach_rest_unit_in_row(
diff --git a/av1/common/restoration.h b/av1/common/restoration.h
index 0b5d62b..6ef9e01 100644
--- a/av1/common/restoration.h
+++ b/av1/common/restoration.h
@@ -439,8 +439,6 @@
                                             YV12_BUFFER_CONFIG *frame,
                                             struct AV1Common *cm,
                                             int optimized_lr, int num_planes);
-void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt,
-                                      struct AV1Common *cm, int num_planes);
 void av1_foreach_rest_unit_in_row(
     RestorationTileLimits *limits, int plane_w,
     rest_unit_visitor_t on_rest_unit, int row_number, int unit_size,