evas cache - fix logically dead code

fixes CID 1039931

src/lib/evas/cache/evas_cache_image.c

@@ -993,7 +993,6 @@ evas_cache_image_dirty(Image_Entry *im, unsigned int x, unsigned int y, unsigned
    return im_dirty;
 
 on_error:
-   if (im_dirty) _evas_cache_image_entry_delete(cache, im_dirty);
    evas_cache_image_drop(im);
    return NULL;
 }