The Android SDK does not have a real installer, just place it where you want to run it from. To uninstall it, all you have to do is delete it.

Can I delete Android SDK folder?

If you use your real Android device for debugging, you no longer need them, so you can remove them all. The cleanest way to remove them is using SDK Manager. Open up SDK Manager and uncheck those system images and then apply. Also feel free to remove other components (e.g. old SDK levels) that are of no use.

What is Android SDK used for?

The Android SDK (Software Development Kit) is a set of development tools that are used to develop applications for the Android platform. This SDK provides a selection of tools that are required to build Android applications and ensures the process goes as smoothly as possible.