Remove reference to old dcmtk branch

the dropNetwork changes are now included in the patched branch
of Commontk/DCMTK so we don't need to use the old testing branch

CMakeExternals/DCMTK.cmake

@@ -26,8 +26,7 @@ IF(${add_project})
       BINARY_DIR ${proj}-build
       PREFIX ${proj}${ep_suffix}
       GIT_REPOSITORY "${git_protocol}://github.com/commontk/DCMTK.git"
-      #GIT_TAG "origin/patched"
-      GIT_TAG "origin/dropNetwork"
+      GIT_TAG "origin/patched"
       CMAKE_GENERATOR ${gen}
       BUILD_COMMAND ""
       CMAKE_ARGS