fix: more compiler warnings

contracts/libraries/SessionLib.sol

@@ -276,6 +276,7 @@ library SessionLib {
       uint64 period = uint64(block.timestamp / limit.period);
       return limit.limit - tracker.allowanceUsage[period][account];
     }
+    return 0;
   }
 
   function getState(

contracts/paymasters/GaslessPaymaster.sol

@@ -53,6 +53,7 @@ contract GaslessPaymaster is IPaymaster, Ownable, BootloaderAuth {
     ) external payable onlyBootloader returns (bytes4 magic, bytes memory context) {
         // By default we consider the transaction as accepted.
         magic = PAYMASTER_VALIDATION_SUCCESS_MAGIC;
+        context = "";
 
         // Revert if standart paymaster input is shorter than 4 bytes
         if (_transaction.paymasterInput.length < 4) revert Errors.SHORT_PAYMASTER_INPUT();

contracts/test/ERC20PaymasterMock.sol

@@ -216,7 +216,7 @@ contract ERC20PaymasterMock is
      */
     function callOracle(
         bytes memory //* oracleCalldata */
-    ) external view returns (uint256) {
+    ) external pure returns (uint256) {
         // return getOracleNumericValueFromTxMsg(bytes32('ETH'));
         return 1500 * ORACLE_NOMINATOR;
     }

contracts/test/MockModule.sol

@@ -31,7 +31,7 @@ contract MockModule is IModule {
         IAGWAccount(account).k1AddOwner(address(this));
     }
 
-    function isInited(address account) external view returns (bool) {
+    function isInited(address) external pure returns (bool) {
         return true;
     }
 

contracts/validators/SessionKeyValidator.sol

@@ -45,7 +45,7 @@ contract SessionKeyValidator is IValidationHook, IModuleValidator, IModule {
     return status;
   }
 
-  function handleValidation(OperationType operationType, bytes32 signedHash, bytes memory signature) external view returns (bool) {
+  function handleValidation(OperationType operationType, bytes32 signedHash, bytes memory) external view returns (bool) {
     if (operationType != OperationType.Transaction) {
       return false;
     }