remove PrtStakingPool

contracts/interfaces/IPrtStakingPool.sol

@@ -2,14 +2,7 @@
 pragma solidity ^0.6.10;
 
 interface IPrtStakingPool {
-    function stake(uint256 _amount) external;
-    function unstake(uint256 _amount) external;
     function accrue(uint256 _amount) external;
-    function claim() external;
-    function setFeeSplitExtension(address _feeSplitExtension) external;
-    function getCurrentId() external view returns (uint256); 
-    function getPendingRewards(address _account) external view returns (uint256); 
-    function getSnapshotRewards(uint256 _snapshotId, address _account) external view returns (uint256);
     function feeSplitExtension() external view returns (address);
     function prt() external view returns (address);
 }

contracts/mocks/PrtStakingPoolMock.sol

@@ -0,0 +1,39 @@
+/*
+    Copyright 2024 Index Cooperative
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+    SPDX-License-Identifier: Apache License, Version 2.0
+*/
+
+pragma solidity ^0.6.10;
+pragma experimental ABIEncoderV2;
+
+import { IPrt } from "../interfaces/IPrt.sol";
+import { ISetToken } from "../interfaces/ISetToken.sol";
+
+contract PrtStakingPoolMock {
+    ISetToken public immutable setToken;
+    IPrt public immutable prt;
+    address public feeSplitExtension;
+
+    constructor(ISetToken _setToken, IPrt _prt, address _feeSplitExtension) public {
+        prt = _prt;
+        setToken = _setToken;
+        feeSplitExtension = _feeSplitExtension;
+    }
+
+    function accrue(uint256 _amount) external {
+        setToken.transferFrom(msg.sender, address(this), _amount);
+    }
+}