CPP: Delete parenthesized comment.

Author: geoffw0

cpp/ql/src/semmle/code/cpp/exprs/BuiltInOperations.qll

@@ -688,8 +688,7 @@ class BuiltInOperationHasTrivialMoveConstructor extends BuiltInOperation,
  * The `__has_trivial_move_assign` built-in operation (used by some
  * implementations of the `<type_traits>` header).
  *
- * Returns if the move-assign operator `C::operator =(C &&c)` is trivial
- * (i.e., can be generated by the compiler).
+ * Returns if the move-assign operator `C::operator =(C &&c)` is trivial.
  * ```
  * template<typename T>
  *   struct has_trivial_move_assign