Remove unused copy_partitioning

Change-Id: I75a2a3772ed17e73180eb4f263cc838cae4927b0

vp9/encoder/vp9_encodeframe.c

diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index bb3873c..eb63b1a 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -1162,26 +1162,6 @@
   }
 }
 
-static void copy_partitioning(VP9_COMMON *cm, MODE_INFO *mi_8x8,
-  MODE_INFO *prev_mi_8x8) {
-  const int mis = cm->mi_stride;
-  int block_row, block_col;
-
-  for (block_row = 0; block_row < 8; ++block_row) {
-    for (block_col = 0; block_col < 8; ++block_col) {
-      MODE_INFO *const prev_mi =
-          prev_mi_8x8[block_row * mis + block_col].src_mi;
-      const BLOCK_SIZE sb_type = prev_mi ? prev_mi->mbmi.sb_type : 0;
-
-      if (prev_mi) {
-        const ptrdiff_t offset = prev_mi - cm->prev_mi;
-        mi_8x8[block_row * mis + block_col].src_mi = cm->mi + offset;
-        mi_8x8[block_row * mis + block_col].src_mi->mbmi.sb_type = sb_type;
-      }
-    }
-  }
-}
-
 const struct {
   int row;
   int col;