libgnt/libgnt

Fix doc build with latest gi-docgen

2 months ago, Elliott Sales de Andrade
cc3d07cf4eca
Fix doc build with latest gi-docgen

It doesn't like the version with `-devel` suffix, so tweak a bit so it's fine
with it.

Also, clean up unused variables.

Testing Done:
Ran `ninja build` with docs enabled.

Reviewed at https://reviews.imfreedom.org/r/2997/
option('devenv-config-dir', type : 'string', yield : true,
description : 'config directory for running a devenv (defaults to a subdirectory of buildroot)')
option('doc', type : 'boolean', value : true, yield : true,
description : 'build documentation with gtk-doc')
option('introspection', type : 'boolean', value : true, yield : true,
description : 'build introspection data')