python3: remove obsolete deletion of non-deterministic .pyc files

python3: remove obsolete deletion of non-deterministic .pyc files

These .pyc files were non-deterministic because they used frozensets[1],
but this has been fixed in 3.11 onwards.

[1] https://github.com/python/cpython/issues/81777
[2] https://github.com/python/cpython/commit/51999c960e7fc45feebd629421dec6524a5fc803

(From OE-Core rev: c8c391ed3e0598a3bea7bc0981126d870315063d)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>