update units feature

de.prob2.units.feature/feature.xml

@@ -224,58 +224,14 @@ litigation.
    </license>
 
    <requires>
-      <import plugin="org.eclipse.ui" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.ui.ide" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.ui.views" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.core.runtime" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.core.databinding" version="1.2.0" match="compatible"/>
-      <import plugin="org.eclipse.jface.databinding" version="1.2.1" match="compatible"/>
-      <import plugin="org.eclipse.core.databinding.beans" version="1.1.1" match="compatible"/>
-      <import plugin="org.eclipse.gef" version="3.7.0" match="compatible"/>
-      <import plugin="de.prob.core" version="9.3.0" match="equivalent"/>
-      <import plugin="org.eventb.core" version="2.1.0"/>
-      <import plugin="org.rodinp.core" version="1.3.1"/>
-      <import plugin="de.prob.ui" version="7.3.0" match="equivalent"/>
-      <import plugin="org.eclipse.core.resources" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.core.expressions" version="3.4.101" match="compatible"/>
-      <import plugin="org.eclipse.gef" version="3.5.0" match="compatible"/>
-      <import plugin="org.eclipse.ui.navigator" version="3.5.0" match="greaterOrEqual"/>
+      <import feature="de.prob2.feature" version="2.3.5.qualifier"/>
    </requires>
 
    <plugin
-         id="de.bmotionstudio.gef.editor"
+         id="de.prob.units"
          download-size="0"
          install-size="0"
          version="0.0.0"
          unpack="false"/>
 
-   <plugin
-         id="de.prob.core"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"/>
-
-   <plugin
-         id="de.prob.plugin"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         fragment="true"
-         unpack="false"/>
-
-   <plugin
-         id="de.prob.ui"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
-   <plugin
-         id="de.bmotionstudio.rodin"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         fragment="true"
-         unpack="false"/>
-
 </feature>