Revert "Make sure the new method is actually added"

This reverts commit ba24e442a603177cf81fd7d39978e43f562f1ca4.
Revert "Use MethodNode instead of MethodVisitor"

This reverts commit d1fafebc5eeeab50f66e18d6f62f3f314d1a45d5.
Handle deobf in PCCASMTransformer