MT#57440 in `RTMP_ReadPacket()` variable 'didAlloc' set but not used

Just removal of a few unsed variables:

     rtmp.c: In function 'RTMP_ReadPacket':
     rtmp.c:2854:7: warning: variable 'didAlloc' set but not used [-Wunused-but-set-variable]
      2854 |   int didAlloc = FALSE;
           |       ^~~~~~~~

and this:

     rtmp.c:1393:35: warning: 'av_record' defined but not used [-Wunused-const-variable=]
      1393 | #define SAVC(x) static const AVal av_##x = AVC(#x)
           |                                   ^~~
     rtmp.c:1706:1: note: in expansion of macro 'SAVC'
      1706 | SAVC(record);
           | ^~~~

Change-Id: I8a2bc2c415b44c99b6d881fb7118475f4020c713

apps/rtmp/librtmp/rtmp.c

@@ -1703,7 +1703,6 @@ SendFCUnpublish(RTMP *r)
 
 SAVC(publish);
 SAVC(live);
-SAVC(record);
 
 static int
 SendPublish(RTMP *r)
@@ -2851,7 +2850,6 @@ int RTMP_ReadPacket(RTMP *r, RTMPPacket *packet)
   uint8_t hbuf[RTMP_MAX_HEADER_SIZE] = { 0 };
   unsigned char *header = hbuf;
   int nSize, hSize, nToRead, nChunk;
-  int didAlloc = FALSE;
 
   RTMP_Log(RTMP_LOGDEBUG2, "%s: fd=%d", __FUNCTION__, r->m_sb.sb_socket);
 
@@ -2959,7 +2957,6 @@ int RTMP_ReadPacket(RTMP *r, RTMPPacket *packet)
 	  RTMP_Log(RTMP_LOGDEBUG, "%s, failed to allocate packet", __FUNCTION__);
 	  return FALSE;
 	}
-      didAlloc = TRUE;
       packet->m_headerType = (hbuf[0] & 0xc0) >> 6;
     }