removed redundant dot cost for base-2 log curve

contracts/bondage/Bondage.sol

@@ -290,35 +290,4 @@ contract Bondage is Destructible {
         return 0;
     }
 
-    //log based 2 taylor series in assembly
-    function fastlog2(uint256 x) private pure returns (uint256 y) {
-        assembly {
-            let arg := x
-            x := sub(x, 1)
-            x := or(x, div(x, 0x02))
-            x := or(x, div(x, 0x04))
-            x := or(x, div(x, 0x10))
-            x := or(x, div(x, 0x100))
-            x := or(x, div(x, 0x10000))
-            x := or(x, div(x, 0x100000000))
-            x := or(x, div(x, 0x10000000000000000))
-            x := or(x, div(x, 0x100000000000000000000000000000000))
-            x := add(x, 1)
-            let m := mload(0x40)
-            mstore(m, 0xf8f9cbfae6cc78fbefe7cdc3a1793dfcf4f0e8bbd8cec470b6a28a7a5a3e1efd)
-            mstore(add(m, 0x20), 0xf5ecf1b3e9debc68e1d9cfabc5997135bfb7a7a3938b7b606b5b4b3f2f1f0ffe)
-            mstore(add(m, 0x40), 0xf6e4ed9ff2d6b458eadcdf97bd91692de2d4da8fd2d0ac50c6ae9a8272523616)
-            mstore(add(m, 0x60), 0xc8c0b887b0a8a4489c948c7f847c6125746c645c544c444038302820181008ff)
-            mstore(add(m, 0x80), 0xf7cae577eec2a03cf3bad76fb589591debb2dd67e0aa9834bea6925f6a4a2e0e)
-            mstore(add(m, 0xa0), 0xe39ed557db96902cd38ed14fad815115c786af479b7e83247363534337271707)
-            mstore(add(m, 0xc0), 0xc976c13bb96e881cb166a933a55e490d9d56952b8d4e801485467d2362422606)
-            mstore(add(m, 0xe0), 0x753a6d1b65325d0c552a4d1345224105391a310b29122104190a110309020100)
-            mstore(0x40, add(m, 0x100))
-            let magic := 0x818283848586878898a8b8c8d8e8f929395969799a9b9d9e9faaeb6bedeeff
-            let shift := 0x100000000000000000000000000000000000000000000000000000000000000
-            let a := div(mul(x, magic), shift)
-            y := div(mload(add(m, sub(255, a))), shift)
-            y := add(y, mul(256, gt(arg, 0x8000000000000000000000000000000000000000000000000000000000000000)))
-        }
-    }
 }