Fix staking precompile ABI

Author: gztensor

runtime/src/precompiles/solidity/staking.abi

@@ -17,30 +17,6 @@
         "stateMutability": "payable",
         "type": "function"
     },
-    {
-        inputs: [
-        {
-            internalType: "bytes32",
-            name: "hotkey",
-            type: "bytes32",
-        },
-        {
-            internalType: "bytes32",
-            name: "coldkey",
-            type: "bytes32",
-        },
-        ],
-        name: "getStake",
-        outputs: [
-        {
-            internalType: "uint64",
-            name: "",
-            type: "uint64",
-        },
-        ],
-        stateMutability: "view",
-        type: "function",
-    },
     {
         "inputs": [
             {