Uninstall Remove Steam

 $ sudo apt-get remove steam steam-launcher

[sudo] password for dhwan:
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'steam:i386' is not installed, so not removed
The following packages will be REMOVED:
  steam-launcher
0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded.
After this operation, 3.573 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 322814 files and directories currently installed.)
Removing steam-launcher (1:1.0.0.71) ...
Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...
Processing triggers for mime-support (3.64ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1ubuntu1) ...
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu2) ...
Rebuilding /usr/share/applications/bamf-2.index...

:~$ sudo apt-get purge steam steam-launcher
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'steam:i386' is not installed, so not removed
The following packages will be REMOVED:
  steam-launcher*
0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 322789 files and directories currently installed.)
Purging configuration files for steam-launcher (1:1.0.0.71) ...

:~$ rm -rf ~/.local/share/Steam && rm -rf ~/.steam