Remove unused allocation for last_frame_db

Change-Id: Ie02e188662119ee2719c79283641b9b74849cfab

av1/encoder/encoder.c

@@ -561,7 +561,6 @@ static void dealloc_compressor_data(AV1_COMP *cpi) {
   aom_free_frame_buffer(&cpi->last_frame_uf);
 #if CONFIG_LOOP_RESTORATION
   av1_free_restoration_buffers(cm);
-  aom_free_frame_buffer(&cpi->last_frame_db);
   aom_free_frame_buffer(&cpi->trial_frame_rst);
   aom_free(cpi->extra_rstbuf);
   {
@@ -831,15 +830,6 @@ static void alloc_util_frame_buffers(AV1_COMP *cpi) {
                        "Failed to allocate last frame buffer");
 
 #if CONFIG_LOOP_RESTORATION
-  if (aom_realloc_frame_buffer(&cpi->last_frame_db, cm->width, cm->height,
-                               cm->subsampling_x, cm->subsampling_y,
-#if CONFIG_HIGHBITDEPTH
-                               cm->use_highbitdepth,
-#endif
-                               AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL,
-                               NULL, NULL))
-    aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
-                       "Failed to allocate last frame deblocked buffer");
   if (aom_realloc_frame_buffer(
           &cpi->trial_frame_rst,
 #if CONFIG_FRAME_SUPERRES

av1/encoder/encoder.h

@@ -458,7 +458,6 @@ typedef struct AV1_COMP {
 
   YV12_BUFFER_CONFIG last_frame_uf;
 #if CONFIG_LOOP_RESTORATION
-  YV12_BUFFER_CONFIG last_frame_db;
   YV12_BUFFER_CONFIG trial_frame_rst;
   uint8_t *extra_rstbuf;  // Extra buffers used in restoration search
   RestorationInfo rst_search[MAX_MB_PLANE];  // Used for encoder side search