Revert "[utils] Encode URLs in `YoutubeDLCookieProcessor`"

This reverts commit 915f911e36.

When the request is copied, `unredirected_hdrs` are not copied, which causes issues elsewhere
Reopens #263

yt_dlp/utils.py

@@ -2926,15 +2926,7 @@ class YoutubeDLCookieProcessor(compat_urllib_request.HTTPCookieProcessor):
         #                 response.headers[set_cookie_header] = set_cookie_escaped
         return compat_urllib_request.HTTPCookieProcessor.http_response(self, request, response)
 
-    def http_request(self, request):
+    https_request = compat_urllib_request.HTTPCookieProcessor.http_request
-        # If the URL contains non-ASCII characters, the cookies
-        # are lost before the request reaches YoutubeDLHandler.
-        # So we percent encode the url before adding cookies
-        # See: https://github.com/yt-dlp/yt-dlp/issues/263
-        request = update_Request(request, url=escape_url(request.get_full_url()))
-        return compat_urllib_request.HTTPCookieProcessor.http_request(self, request)
-
-    https_request = http_request
     https_response = http_response