COMP: Fix usage of CURL_INCLUDE_DIRS CMake variable

Following commit r22724, cmcurl project has been removed
in favor of the official curl project. When doing this transition, the call
to "include(${SLICERLIBCURL_USE_FILE})" has been improperly change
info "include(${CURL_INCLUDE_DIRS})".

Since the CURL include directories are already included in [1] and [2],
this commit remove the incorrect call to "include(${CURL_INCLUDE_DIRS})".

[1] Libs/RemoteIO/CMakeLists.txt
[2] Modules/CLI/MIDASApplications/DownloadSlicerTutorials/CMakeLists.txt

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22730 3bd1e089-480b-0410-8dfb-8563597acbee