PEP 3135 [^1] simplified the syntax for `super()` in Python 3.0 from:
super(ClassName, self)
to the following very simple and equivalent [^2] syntax:
super()
The current Keras codebase already requires Python 3+, and there's a mix of the
two syntax formats above, sometimes both are used in a single file.
This change simplifies the entire code base by cleaning up the remaining
explicit uses of the current class name and `self` and using the cleaner
`super()` syntax everywhere consistently.
Since the new syntax is intended to be a shorthand for the old syntax, this
change should have no semantic differences from before.
[^1]: https://peps.python.org/pep-3135/
[^2]: https://docs.python.org/3/library/functions.html#super