Remove Zulip rustdoc nomination alert

Author: fmease

triagebot.toml

@@ -389,15 +389,6 @@ message_on_remove = "Issue #{number}'s prioritization request has been removed."
 message_on_close = "Issue #{number} has been closed while requested for prioritization."
 message_on_reopen = "Issue #{number} has been reopened."
 
-[notify-zulip."T-rustdoc"]
-required_labels = ["I-nominated"]
-zulip_stream = 266220 # #rustdoc
-topic = "nominated: #{number}"
-message_on_add = """\
-@*T-rustdoc* issue #{number} "{title}" has been nominated for `T-rustdoc` discussion.
-"""
-message_on_remove = "Issue #{number}'s nomination request has been removed."
-
 [notify-zulip."I-types-nominated"]
 zulip_stream = 326866 # #T-types/nominated
 topic = "#{number}: {title}"