JetBrains: Remove com.intellij.modules.lang dependency

Created by: philipp-spiess

I was looking into JetBrains Gateway product support and noticed that according to the JetBrains web UI, the com.intellij.modules.lang module is not supported by that product.

I tried removing it from the definition file but it seems that the product still works without any issues, so let's remove it.

Test plan

Manual testing and hoping that the Java CI steps pass:

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.