Fix unused variable in release builds

Assert is not needed in this case.

source/blender/editors/space_file/file_draw.c

@@ -148,9 +148,6 @@ static void file_but_enable_drag(uiBut *but,
            (file->typeflag & FILE_TYPE_ASSET) != 0) {
     char blend_path[FILE_MAX_LIBEXTRA];
     if (BLO_library_path_explode(path, blend_path, NULL, NULL)) {
-      const FileAssetSelectParams *asset_params = ED_fileselect_get_asset_params(sfile);
-      BLI_assert(asset_params != NULL);
-
       const int import_method = ED_fileselect_asset_import_method_get(sfile, file);
       BLI_assert(import_method > -1);