No longer need explicit core.runtime, osgi. A previous intgration
build required it.

tests/org.eclipse.jem.tests/plugin.xml

diff --git a/tests/org.eclipse.jem.tests/plugin.xml b/tests/org.eclipse.jem.tests/plugin.xml
index 1a51b90..5f4f7bd 100644
--- a/tests/org.eclipse.jem.tests/plugin.xml
+++ b/tests/org.eclipse.jem.tests/plugin.xml
@@ -23,8 +23,6 @@
       <import plugin="org.eclipse.jdt.launching"/>
       <import plugin="org.eclipse.emf.ecore"/>
       <import plugin="org.eclipse.jem"/>
-      <import plugin="org.eclipse.core.runtime"/>
-      <import plugin="org.eclipse.osgi"/>
    </requires>