Remove unused api_filter. Change-Id: Idbfd8132067a5bd0dc65d872141eda0dfa5174ab Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/187488 Tested-by: Alexander Kurtakov <akurtako@redhat.com> Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>