OpenCollada used to rely on PCRE (a Perl Regexp library). Since
switching to Aras' OpenCollada fork (#122270), the library is no
longer needed, but is still required as a dependency.
This patch cleans this up by completely removing it from our build
system and linux system package installation script. This also lets
us remove it from our pre-compiled library platform repos, making the
process of recompiling our libraries from scratch easier as it wasn't
compiled by our dependency builder anymore.
Pull Request: https://projects.blender.org/blender/blender/pulls/134310
567669d3ff