When you made the change to pom.xml, a popup probably would have appeared at the bottom-right of the IDE saying:
Maven projects need to be imported
Import Changes Enable Auto-Import
If you click ‘Import Changes’, you should find that IntelliJ reloads the POM file and removes the dependencies that you’ve deleted.
Assuming you no longer have that popup on the screen, you can achieve the same thing by opening the ‘Maven’ tab on the right-hand side of the screen and clicking the ‘Reimport All Maven Projects’ button (looks like a refresh button with two arrows in a circle).
You can also have IntelliJ do this for you automatically. If the popup mentioned above is still open, simply click ‘Enable Auto-Import’, otherwise open the settings and navigate to:
Build, Execution, Deployment > Build Tools > Maven > Importing
then select the option “Import Maven projects automatically”.
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