Revert "[utils] Add support for cookies with spaces used instead of tabs"

According to [1] TABs must be used as separators between fields.
Files produces by some tools with spaces as separators are considered
malformed.

1. https://curl.haxx.se/docs/http-cookies.html

This reverts commit cff99c91d1.

youtube_dl/utils.py

@@ -2752,11 +2752,6 @@ class YoutubeDLCookieJar(compat_cookiejar.MozillaCookieJar):
             for line in f:
                 if line.startswith(self._HTTPONLY_PREFIX):
                     line = line[len(self._HTTPONLY_PREFIX):]
-                # Cookie file may contain spaces instead of tabs.
-                # Replace all spaces with tabs to make such cookie files work
-                # with MozillaCookieJar.
-                if not line.startswith('#'):
-                    line = re.sub(r' +', r'\t', line)
                 cf.write(compat_str(line))
         cf.seek(0)
         self._really_load(cf, filename, ignore_discard, ignore_expires)