[aur-general] Remove picard-plugins (now part of picard)

[Johannes Dewender]

Hello,

please remove https://aur.archlinux.org/packages/picard-plugins/

All plugins of that package are now directly included in picard and 
picard-git (since 3 weeks ago)

I am the creator and was the last maintainer of that package.

There are other plugin-related packages that include plugins not 
included in the official picard package: picard-plugins-git, 
picard-plugins-aux, picard-plugins-search.

--
JonnyJD