docs/zh_TW: remove the mailing list entry for zh_TW

Due to some reasons the current mailing list will be revoked and new one
will replace it in the future, hence remove the entry from MAINTAINERS
ahead of time.

Signed-off-by: Hu Haowen <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: srcres258

MAINTAINERS

@@ -21620,7 +21620,6 @@ F:	kernel/trace/trace_sched_wakeup.c
 
 TRADITIONAL CHINESE DOCUMENTATION
 M:	Hu Haowen <[email protected]>
-L:	[email protected] (moderated for non-subscribers)
 S:	Maintained
 W:	https://github.com/srcres258/linux-doc
 T:	git git://github.com/srcres258/linux-doc.git doc-zh-tw