Apply CoPilot suggestion of simplifying code

Author: snakefoot

src/libraries/Microsoft.Extensions.Logging.Abstractions/src/FormattedLogValues.cs

@@ -70,15 +70,11 @@ public FormattedLogValues(string? format, params object?[]? values)
                     {
                         return new KeyValuePair<string, object?>("{OriginalFormat}", _originalMessage);
                     }
-                    else
-                    {
-                        throw new IndexOutOfRangeException();
-                    }
-                }
-                else
-                {
-                    return _formatter.GetValue(_values, index);
+
+                    throw new IndexOutOfRangeException();
                 }
+
+                return _formatter.GetValue(_values, index);
             }
         }