How do I remove a custom MIUI lockscreen via adb or other means?
Fist you need to know MIUI package name

adb shell pm list package -3


This command will display all the third party installed apps. If MIUI lockscreen does not show up here use :

adb shell pm list package -s


OR

adb shell pm list package -f


then copy the package name and use this command :

adb shell pm uninstall &lt;your app package&gt;