it's only used

Change-Id: I6240b18e1850c0f7e657d5d035caaf111935d730
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ui/+/185900
Tested-by: Platform Bot <platform-bot@eclipse.org>