app-office/calligraplan: Drop obsolete patch to fix USE=pim
After kcalendarcore was fixed properly in upstream
commit
28eab632238352ab46f6c1db11f6ebf7d3ce0690, this patch is superfluous
and apparently breaks build with first release as a Framework in 5.63.
Cleanup dependencies at the same time; with a minimum >=19.08.0, there is
no more kde-apps/kcalcore to satisfy this package.
Closes: https://bugs.gentoo.org/697660
Package-Manager: Portage-2.3.76, Repoman-2.3.17
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>