Remove unused variable assignments

exceptions/generic/MDInaccessiblePropertyException.php

@@ -12,8 +12,7 @@ final class MDInaccessiblePropertyException extends Exception {
      */
     public function errorMessage() {
         //error message
-        $errorMsg = 'Property is inaccessible';
-        return $errorMsg;
+        return 'Property is inaccessible';
 
     }
 }