Uninstall Android Studio + SDK

I am using linux arch. I installed android according to [ArchWiki](https://wiki.archlinux.org/index.php/Android) . I uninstalled every skd component and android studio using pacman -Rs. Also, I removed every hidden folder in the home directory that had something to do with android such .android, .gradle, AndroidStudio. But the environment variable ANDROID_HOME is still set and the following command ps aux | grep 'adb' returns adb -L tcp:5037 fork-server server --reply-fd 4 Where is the environment variable ANDROID_HOME set and what means adb -L tcp:5037 fork-server server --reply-fd 4? Is android not properly uninstalled? The command adb returns bash: adb: command not found EDIT: In a */proc/pid/environ*, there are still things like */opt/android-sdk/platform-tools:/opt/android-sdk/tools:/opt/android-sdk/tools/bin*