Remove `updateBaseURI`

We do not consider method updateBaseURI necessary in the SBT smart contract and want to lower the chance that the malicious minter of SBT tokens will change the address later after the token has already been minted.

sbt-contracts/contracts/SBT.sol

Lines 20 to 22 in 7f19284

    
           function updateBaseURI(string memory baseURI_) public onlyOwner { 
        
               baseURI = baseURI_; 
        
           }

	function updateBaseURI(string memory baseURI_) public onlyOwner {
	baseURI = baseURI_;
	}