radicale: remove obsolete package

In this repository, we do have radicale2, so OpenWrt
community should switch to use that version.

This version (= 1.x.x) is really old, no longer developed
and there are newer versions, which can be used e.g.
version 2.x.x, in this repo as radicale2 or there is
also version 3.x.x, which is not packaged for OpenWrt so far.

Signed-off-by: Josef Schlehofer <[email protected]>

Author: BKPepe