Fix minor refactoring

[yhna940]

No description provided.

[github-actions]

Coverage report

The coverage rate is 86.99%

The branch rate is 66.17%

91% of new lines are covered.

Diff Coverage details (click to unfold)

mmtune/mm/context/rewriters/register.py

100.0% of new lines are covered

mmtune/mm/context/rewriters/instantiate.py

100.0% of new lines are covered

mmtune/mm/context/rewriters/path.py

100.0% of new lines are covered

mmtune/mm/tasks/base.py

100.0% of new lines are covered

mmtune/mm/context/rewriters/dump.py

100.0% of new lines are covered

mmtune/mm/context/rewriters/merge.py

66.66666666666667% of new lines are covered

mmtune/mm/context/rewriters/init.py

100.0% of new lines are covered

[KKIEEK]

I think MergeConfig is better than ConfigMerger, what do you think?

[yhna940]

you do it.