dsputil: remove debug message in dsputil_init().

AVCodecContext.bits_per_raw_sample is used for audio too, and values other
than 8, 9, and 10 are valid.

libavcodec/dsputil.c

@@ -3131,8 +3131,6 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
         }
         break;
     default:
-        av_log(avctx, AV_LOG_DEBUG, "Unsupported bit depth: %d\n", avctx->bits_per_raw_sample);
-    case 8:
         BIT_DEPTH_FUNCS(8, _16);
         break;
     }