Remove continue from aria2c

This doesn't actually work, or make sense, without configuring the stream selector to use `inorder` instead of `default` for the algorithm.

Ideally, `aria2c` would write the needed information for resuming downloads in its own file before exiting.
Otherwise, it's more reliable to download everything again.

yt_dlp/downloader/external.py

@@ -293,7 +293,7 @@ class Aria2cFD(ExternalFD):
         return super()._call_downloader(tmpfilename, info_dict)
 
     def _make_cmd(self, tmpfilename, info_dict):
-        cmd = [self.exe, '-c', '--no-conf',
+        cmd = [self.exe, '--no-conf',
                '--console-log-level=warn', '--summary-interval=0', '--download-result=hide',
                '--http-accept-gzip=true', '--file-allocation=none', '-x16', '-j16', '-s16']
         if 'fragments' in info_dict: