How to remove unused imports in Intellij IDEA on commit?

In Mac IntelliJ IDEA, the command is Cmd + Option + O

For some older versions it is apparently Ctrl + Option + O.

(Letter O not Zero 0) on the latest version 2019.x

When you commit, tick the Optimize imports option on the right. This will become the default until you change it.

I prefer using the Reformat code option as well.

If you are using IntelliJ IDEA or Android Studio:

Android optimize imports

Go to Settings > Editor > General >Auto Import and check the Optimize imports on the fly checkbox.

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