Delete misleading comment about testing llcapabilitylistener.

There was a comment in CMakeLists.txt left over from 2009 (!) about commenting
out the unit test for llcapabilitylistener. Fortunately we've since reinstated
the test as an integration test, but the comment was never removed -- until now.

indra/newview/CMakeLists.txt

@@ -2371,11 +2371,6 @@ include(LLAddBuildTest)
 SET(viewer_TEST_SOURCE_FILES
   llagentaccess.cpp
   llwlparammanager.cpp
-  # Not *actually* a unit test, it's an integration test.
-  # Because it won't work in the new unit test iface, i've commented out
-  # and notified Nat. Delete this when it's replaced!
-  # + poppy & brad 2009-06-05
-  # llcapabilitylistener.cpp
   )
 set_source_files_properties(
   ${viewer_TEST_SOURCE_FILES}