ovault example changes (#1590)

Signed-off-by: shankar <shankar@layerzerolabs.org>

Author: shankars99

examples/ovault-evm/contracts/MyAssetOFT.sol

@@ -11,12 +11,4 @@ contract MyAssetOFT is OFT {
         address _lzEndpoint,
         address _delegate
     ) OFT(_name, _symbol, _lzEndpoint, _delegate) Ownable(_delegate) {}
-
-    function mint(address to, uint256 amount) external {
-        _mint(to, amount);
-    }
-
-    function burn(address from, uint256 amount) external {
-        _burn(from, amount);
-    }
 }