Remove unused variable assignments

exceptions/generic/MDAccessDeniedException.php

@@ -2,7 +2,7 @@
 declare(strict_types = 1);
 
 /**
- * Custom exception class for invalid page parameters.
+ * Custom exception class to throw when users attempt to access a page without necessary permissions.
  */
 final class MDAccessDeniedException extends MDExpectedException {
     /**
@@ -12,8 +12,7 @@ final class MDAccessDeniedException extends MDExpectedException {
      */
     public function errorMessage() {
         //error message
-        $errorMsg = 'Parameter: <b>' . $this->getMessage() . '</b> is not a valid, numeric values.';
-        return $errorMsg;
+        return 'Access denied: ' . $this->getMessage();
 
     }
 }