misc: Mocks directory moved from main directory to tests one

test/mocks/MockDeprecatedReferenceModule.sol

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.15;
+
+import {IDeprecatedReferenceModule} from 'contracts/interfaces/IDeprecatedReferenceModule.sol';
+
+/**
+ * @dev This is a simple mock follow module to be used for testing.
+ */
+contract MockDeprecatedReferenceModule is IDeprecatedReferenceModule {
+    function initializeReferenceModule(
+        uint256,
+        uint256,
+        bytes calldata data
+    ) external pure override returns (bytes memory) {
+        uint256 number = abi.decode(data, (uint256));
+        require(number == 1, 'MockDeprecatedReferenceModule: invalid');
+        return new bytes(0);
+    }
+
+    function processComment(
+        uint256 profileId,
+        uint256 pointedProfileId,
+        uint256 pointedPubId,
+        bytes calldata data
+    ) external override {}
+
+    function processMirror(
+        uint256 profileId,
+        uint256 pointedProfileId,
+        uint256 pointedPubId,
+        bytes calldata data
+    ) external override {}
+}