Remove deprecated code for conda-build 24.7 (#5333)

* Remove deprecated constants etc. from conda_interface.py per expedited deprecation schedule

* More conda_interface.py deprecation removals

* More conda_build.conda_interface.py deprecation removals

* Remove remaining conda_build.interface.py deprecations / module

* Remove conda_build.config.noarch_python_build_age_default

* Remove conda_build.index.channel_data deprecation

* Remove conda_build.config.Config.override_channels

* Remove deprecations from conda_build.utils

* Remove deprecated conda_build.variants.get_vars(loop_only) argument

* Update news file to sort removals into alphabetical order and make it more generally readable

* Update '_channel_data' variable in

* Clean up unnecessary code

* Update news file