* Removed mintingFinished from ERC20Mintable.
* Removed MintingFinished from ERC721Mintable.
* Removed MintingFinished event.
(cherry picked from commit 5fdeaa81d5)
* Removed mintingFinished from ERC20Mintable.
* Removed MintingFinished from ERC721Mintable.
* Removed MintingFinished event.
(cherry picked from commit 5fdeaa81d5)