Remove unused package export from bundle org.eclipse.jgit.lfs.test

This may have caused the spurious compile errors sometimes observed in
Eclipse since org.eclipse.jgit.lfs.lib is a split package to enable
testing package private code in bundle org.eclipse.jgit.lfs.

Change-Id: I0294448965de8ad8c254b26382386ef2b9f6e863
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.lfs.test/META-INF/MANIFEST.MF

@@ -15,6 +15,5 @@ Import-Package: org.eclipse.jgit.junit;version="[4.3.0,4.4.0)",
  org.junit;version="[4.0.0,5.0.0)",
  org.junit.runner;version="[4.0.0,5.0.0)",
  org.junit.runners;version="[4.0.0,5.0.0)"
-Export-Package: org.eclipse.jgit.lfs.lib;version="4.3.0";x-internal:=true,
+Export-Package: org.eclipse.jgit.lfs.test;version="4.3.0";x-friends:="org.eclipse.jgit.lfs.server.test"
- org.eclipse.jgit.lfs.test;version="4.3.0";x-friends:="org.eclipse.jgit.lfs.server.test"