local-metadata: remove uppercase versions of blacklisted words
local-metadata: remove uppercase versions of blacklisted words

Those words are matched using strcasestr so there's no point in having
them twice.

https://bugzilla.gnome.org/show_bug.cgi?id=748604

MikePetullo/grilo-plugins,GNOME/grilo-plugins,grilofw/grilo-plugins,jasuarez/grilo-plugins,MikePetullo/grilo-plugins,GNOME/grilo-plugins,grilofw/grilo-plugins,MikePetullo/grilo-plugins,jasuarez/grilo-plugins