Method removeReleasedCallback

src/fl/ui/button.h:115–115

    void removeClickedCallback(int id) FL_NOEXCEPT { mCallbacks.remove(id); }
    void removePressedCallback(int id) FL_NOEXCEPT { mPressCallbacks.remove(id); }
    void removeReleasedCallback(int id) FL_NOEXCEPT { mReleaseCallbacks.remove(id); }

    void clearCallbacks() FL_NOEXCEPT {
        mCallbacks.clear();