http: remove CRLF variable

PR-URL: https://github.com/nodejs/node/pull/40101
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

lib/_http_common.js

@@ -268,7 +268,7 @@ module.exports = {
   _checkIsHttpToken: checkIsHttpToken,
   chunkExpression: /(?:^|\W)chunked(?:$|\W)/i,
   continueExpression: /(?:^|\W)100-continue(?:$|\W)/i,
-  CRLF: '\r\n',
+  CRLF: '\r\n', // TODO: Deprecate this.
   freeParser,
   methods,
   parsers,