Remove nil check in Glitch::KeywordMute#=~.
Remove nil check in Glitch::KeywordMute#=~.

@regex can no longer be nil, so we don't need to check it.

Kirishima21/mastodon,Kirishima21/mastodon,vahnj/mastodon,glitch-soc/mastodon,vahnj/mastodon,Kirishima21/mastodon,im-in-space/mastodon,glitch-soc/mastodon,Kirishima21/mastodon,im-in-space/mastodon,vahnj/mastodon,im-in-space/mastodon,vahnj/mastodon,vahnj/mastodon,im-in-space/mastodon,glitch-soc/mastodon,glitch-soc/mastodon