Revert "avcodec/opus_parser: Handle complete frames flag."

This reverts commit 7e0df5910e.

"complete frames" containers, even if they don't need to assemble
packets, still depended on this code for proper packet duration and
timestamp generation.

libavcodec/opus_parser.c

@@ -170,24 +170,19 @@ static int opus_parse(AVCodecParserContext *ctx, AVCodecContext *avctx,
     ParseContext *pc    = &s->pc;
     int next, header_len;
 
-    if (ctx->flags & PARSER_FLAG_COMPLETE_FRAMES) {
-        next = buf_size;
-        header_len = 0;
-    } else {
-        next = opus_find_frame_end(ctx, avctx, buf, buf_size, &header_len);
-
-        if (s->ts_framing && next != AVERROR_INVALIDDATA &&
-            ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
-            *poutbuf      = NULL;
-            *poutbuf_size = 0;
-            return buf_size;
-        }
+    next = opus_find_frame_end(ctx, avctx, buf, buf_size, &header_len);
 
-        if (next == AVERROR_INVALIDDATA){
-            *poutbuf      = NULL;
-            *poutbuf_size = 0;
-            return buf_size;
-        }
+    if (s->ts_framing && next != AVERROR_INVALIDDATA &&
+        ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
+        *poutbuf      = NULL;
+        *poutbuf_size = 0;
+        return buf_size;
+    }
+
+    if (next == AVERROR_INVALIDDATA){
+        *poutbuf      = NULL;
+        *poutbuf_size = 0;
+        return buf_size;
     }
 
     *poutbuf      = buf + header_len;