remove extra var usage

src/plugins/session/permissions/SessionKeyPermissionsPlugin.sol

@@ -247,9 +247,9 @@ contract SessionKeyPermissionsPlugin is ISessionKeyPermissionsPlugin, SessionKey
     // ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
 
     /// @dev A pre user op validation hook that checks the permissions of the key used to validate the user op.
-    function _checkUserOpPermissions(UserOperation calldata userOp) internal returns (uint256 validationRes) {
-        // if not calling executeWithSessionKey, nothing to do.
-        if (bytes4(userOp.callData) != ISessionKeyPlugin.executeWithSessionKey.selector) return validationRes;
+    function _checkUserOpPermissions(UserOperation calldata userOp) internal returns (uint256) {
+        // If not calling executeWithSessionKey, nothing to do. Return 0 as validation success.
+        if (bytes4(userOp.callData) != ISessionKeyPlugin.executeWithSessionKey.selector) return 0;
 
         // Decode the executions array and the session key from the user op's calldata
         (Call[] memory calls, address sessionKey) = abi.decode(userOp.callData[4:], (Call[], address));
@@ -330,7 +330,7 @@ contract SessionKeyPermissionsPlugin is ISessionKeyPermissionsPlugin, SessionKey
         // otherwise a packed struct of the aggregator address (0 here), and two
         // 6-byte timestamps indicating the start and end times at which the op
         // is valid.
-        validationRes = uint160(!validationSuccess ? 1 : 0) | (uint256(sessionKeyData.validUntil) << 160)
+        return uint160(!validationSuccess ? 1 : 0) | (uint256(sessionKeyData.validUntil) << 160)
             | (uint256(currentValidAfter) << (208));
     }
 
@@ -368,7 +368,7 @@ contract SessionKeyPermissionsPlugin is ISessionKeyPermissionsPlugin, SessionKey
 
     /// @dev Runs as a pre exec hook, and updates the spend limits of the session key in use
     function _updateLimitsPreExec(address account, bytes calldata callData) internal {
-        // if not calling executeWithSessionKey, nothing to do.
+        // If not calling executeWithSessionKey, nothing to do.
         if (bytes4(callData) != ISessionKeyPlugin.executeWithSessionKey.selector) return;
 
         (Call[] memory calls, address sessionKey) = abi.decode(callData[4:], (Call[], address));