avcodec/nvenc: Remove aspect-ratio decompensation logic

This dubious behaviour in nvenc was finally removed by nvidia, and
as we refuse to run on anything older than 7.0, we don't need to
keep it around for old versions.

libavcodec/nvenc.c

@@ -953,18 +953,6 @@ static av_cold int nvenc_setup_encoder(AVCodecContext *avctx)
         ctx->init_encode_params.darWidth = avctx->width;
     }
 
-    // De-compensate for hardware, dubiously, trying to compensate for
-    // playback at 704 pixel width.
-    if (avctx->width == 720 &&
-        (avctx->height == 480 || avctx->height == 576)) {
-        av_reduce(&dw, &dh,
-                  ctx->init_encode_params.darWidth * 44,
-                  ctx->init_encode_params.darHeight * 45,
-                  1024 * 1024);
-        ctx->init_encode_params.darHeight = dh;
-        ctx->init_encode_params.darWidth = dw;
-    }
-
     ctx->init_encode_params.frameRateNum = avctx->time_base.den;
     ctx->init_encode_params.frameRateDen = avctx->time_base.num * avctx->ticks_per_frame;