[doc] Drop the obsolete homebrew install section

The parcollet/ccq tap only ever provided experimental packages, and the
section itself noted that the tools were not available there. conda-forge
now covers both Linux and OSX.

Assisted-by: Claude <noreply@anthropic.com>

Author: Wentzell

doc/install_packages.rst

@@ -16,25 +16,3 @@ you can install clair with::
 
 See also `github.com/conda-forge/clair-c2py-feedstock <https://github.com/conda-forge/clair-c2py-feedstock/>`_.
 
-OS X (brew)
------------
-
-Experimental packages of ``c2py`` and ``clair`` are::
-
-  brew install parcollet/ccq/c2py  parcollet/ccq/clair
-
-They are built from source from the GitHub parcollet/ccq repository.
-
-
-.. note::
-
-  The packages with tools are not yet available on the `parcollet/ccq` tap.
-
-Uninstalling
-............
-
-In order to uninstall all formulas from the `parcollet/ccq` tap, you can use::
-
-        brew uninstall `brew list --full-name -1|grep ccq`
-
-