Remove legacy ThirdParty/Cosmo and Filters/Cosmo

This commit removes legacy code in ThirdParty/Cosmo and
Filters/Cosmo. The functionality of Filters/Cosmo will
be provided in ParaView as a VTK extension which will
link directly to CosmoTools.

Change-Id: I6847f6383da9448b54a02f8ac64f100e52653e25
Merge topic 'remove-cosmo' into master

03ae8259 Remove legacy ThirdParty/Cosmo and Filters/Cosmo