Revert "Add case of arg count = 0"

This reverts commit c0f44328d9863ce869ddd3a5adf1df173e52d1cb.
Revert "switch-case jump only small arg count"

This reverts commit b0fe38a81ff9642bc288bee7c3c8d44cd625b9b7.
Revert "Makes argument count to SEL calculation only once"

This reverts commit 3a2bf1d6903d1e7031fd1c35e243efae80d0a7f8.
Revert "Rewrite using sel_registerName()"

This reverts commit df992ea436b81dc2e1e017a39c81f9d658b831a8.
Delete dynamic selector generation code
Add case 0 for clarity