gh-38867: Fix duplicate install of config.py in meson build
    
The  `configure_file` command creating this `config.py` file already has
`install: true` which makes it installed by default. Installing it again
here creates a duplicate entry in wheel packages, which breaks
installing them with some tools (eg. python-installer).
    
URL: #38867
Reported by: Antonio Rojas
Reviewer(s): Tobias Diez

Author: Release Manager

src/sage/meson.build

@@ -86,7 +86,6 @@ foreach package : no_processing
 endforeach
 
 py.install_sources(
-  config_file,
   'all.py',
   'all__sagemath_bliss.py',
   'all__sagemath_categories.py',