obs-ffmpeg: Remove cutoff hack for AAC encoder

The cutoff hack was added many, many years ago as recommended by
Konverter.  Since then, there has been much work on the AAC encoder, so
this hack should no longer be necessary.

plugins/obs-ffmpeg/obs-ffmpeg-audio-encoders.c

@@ -229,17 +229,7 @@ static void *enc_create(obs_data_t *settings, obs_encoder_t *encoder,
 			enc->context->sample_rate = closest;
 	}
 
-	/* if using FFmpeg's AAC encoder, at least set a cutoff value
-	 * (recommended by konverter) */
 	if (strcmp(enc->codec->name, "aac") == 0) {
-		int cutoff1 = 4000 + (int)enc->context->bit_rate / 8;
-		int cutoff2 = 12000 + (int)enc->context->bit_rate / 8;
-		int cutoff3 = enc->context->sample_rate / 2;
-		int cutoff;
-
-		cutoff = MIN(cutoff1, cutoff2);
-		cutoff = MIN(cutoff, cutoff3);
-		enc->context->cutoff = cutoff;
 	}
 
 	info("bitrate: %" PRId64 ", channels: %d, channel_layout: %x\n",