ERC-7540 - Add ERC7540 - remove duplicated method

contracts/interfaces/IERC7540.sol

@@ -140,12 +140,4 @@ interface IERC7540 is IERC4626 {
         address controller,
         uint256 requestId
     ) external view returns (Request memory request);
-
-    /**
-     * @dev Gets the status of an operator for a given controller.
-     * @param controller The address of the controller.
-     * @param operator The address of the operator.
-     * @return status Whether the operator is approved.
-     */
-    function getOperator(address controller, address operator) external view returns (bool status);
 }

contracts/token/ERC20/extensions/ERC7540.sol

@@ -65,7 +65,10 @@ abstract contract ERC7540 is ERC4626, IERC7540 {
         if (shares == 0) {
             revert ERC7540ZeroSharesNotAllowed(sender, shares);
         }
-        require(owner == sender || isOperator(owner, sender), "ERC7540: unauthorized");
+
+        if (owner != sender && !isOperator(owner, sender)) {
+            revert ERC7540Unauthorized(sender, owner);
+        }
 
         requestId = _generateRequestId(controller, shares);
 
@@ -135,13 +138,6 @@ abstract contract ERC7540 is ERC4626, IERC7540 {
         return _pendingRedeemRequests[controller][requestId];
     }
 
-    /**
-     * @dev Function to return operator.
-     */
-    function getOperator(address controller, address operator) public view returns (bool) {
-        return _operators[controller][operator];
-    }
-
     /**
      * @dev Internal function to generate a unique request ID.
      */