Remove duplicate commons-configuration.

- Should get rid of following warning:
  UserWarning: Duplicate name: 'commons-configuration/commons-configuration/1.10/commons-configuration-1.10.jar'

Change-Id: I44b04344a5b182896d967724f90ba8fd6ed16639

@@ -29,7 +29,6 @@ osgi_feature (
     '//lib:jackson-core',
     '//lib:jackson-annotations',
     '//lib:jackson-databind',
-    '//lib:commons-configuration',
     '//lib:commons-collections',
     '//lib:typesafe-config',
     '//lib:concurrent-trees',