requirements: remove no longer used PyGObject

Signed-off-by: Bradley Walters <oss@walters.app>

README.md

@@ -130,8 +130,6 @@ Whipper relies on the following packages in order to run correctly and provide a
   - To avoid bugs it's advised to use `cd-paranoia` versions ≥ **10.2+0.94+2**
   - The package named `libcdio-utils`, available on certain Debian and Ubuntu versions, is affected by a bug: it doesn't include the `cd-paranoia` binary (needed by whipper). Only Debian bullseye (testing) / sid (unstable) and Ubuntu focal (20.04) and later versions have a separate `cd-paranoia` package where the binary is provided. For more details on this issue check the relevant bug reports: [#888053 (Debian)](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888053), [#889803 (Debian)](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889803) and [#1750264 (Ubuntu)](https://bugs.launchpad.net/ubuntu/+source/libcdio/+bug/1750264).
 - [cdrdao](http://cdrdao.sourceforge.net/), for session, TOC, pre-gap, and ISRC extraction
-- [GObject Introspection](https://wiki.gnome.org/Projects/GObjectIntrospection), to provide GLib-2.0 methods used by `task.py`
-- [PyGObject](https://pypi.org/project/PyGObject/), required by `task.py`
 - [musicbrainzngs](https://pypi.org/project/musicbrainzngs/), for metadata lookup
 - [mutagen](https://pypi.python.org/pypi/mutagen), for tagging support
 - [setuptools](https://pypi.python.org/pypi/setuptools), for installation, plugins support
@@ -149,7 +147,6 @@ Some dependencies aren't available in the PyPI. They can be probably installed u
 
 - [cd-paranoia](https://github.com/rocky/libcdio-paranoia)
 - [cdrdao](http://cdrdao.sourceforge.net/)
-- [GObject Introspection](https://wiki.gnome.org/Projects/GObjectIntrospection)
 - [libsndfile](http://www.mega-nerd.com/libsndfile/)
 - [flac](https://xiph.org/flac/)
 - [sox](http://sox.sourceforge.net/)