IntelliJ project configuration: remove unneeded runtime dependencies
IntelliJ project configuration: remove unneeded runtime dependencies

This way we get rid of dependency from intellij.platform.testFramework to relaxng, which has some libraries not converted to repository libraries, and this prevents us from publishing intellij.platform.testFramework as Maven artifact.

allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community