As kali linux is new to all of us, being a learner we all come with a new issue and try to resolve it as quickly as possible. While installing software, most of us don't know the dependency packages that are installed or removed from the system. A great feature that kali linux provide is that when we run apt command, it checks the available package/s in the repository and accordingly asks if to install. Meanwhile, it also checks the un-necessary packages that is not required. Here is a command that removes the un-necessary packages. From the root terminal window, please type apt-get autoremove. When you hit 'return' or 'enter' key, it checks the packages that is to be removed from the system. Please read those packages carefully, before you make confirmation to remove it from the system.