Cleanup deprecated IEC CIM files (#27)

I am not aware of anyone using the IEC CIM files. Instead tools import
and export the CGMES profiles.
I would like to remove those files from the current master and
eventually delete them from the history using the BFG tool along with
other files that should not be in the git history, e.g. images generated
by doxygen, SINERGIEN project specific profiles etc.

I will keep an old version of the master branch before running BFG and
archive it, just in case someone needs these files.

.github/workflows/build-gh-pages.yml

@@ -6,7 +6,6 @@ jobs:
    build-gh-pages:
     runs-on: ubuntu-latest
     env:
-      USE_CIM_VERSION1: IEC61970_16v29a_IEC61968_12v08
       USE_CIM_VERSION4: CGMES_2.4.15_27JAN2020
     steps:
     - uses: actions/checkout@v3   

CMakeLists.txt

@@ -10,14 +10,6 @@ if(USE_CIM_VERSION STREQUAL "CGMES_2.4.15_27JAN2020")
 elseif(USE_CIM_VERSION STREQUAL "CGMES_2.4.15_16FEB2016")
   set(CGMES_BUILD ON)
   set(CIM_NAME "CGMES 2_4_15 16_02_2016")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_17v23")
-  set(CIM_NAME "IEC61970 17v23")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_17v23_IEC61968_13v11")
-  set(CIM_NAME "IEC61970 17v23 - IEC61968 13v11")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_16v29a")
-  set(CIM_NAME "IEC61970 16v29a")
-elseif(USE_CIM_VERSION STREQUAL "IEC61970_16v29a_IEC61968_12v08")
-  set(CIM_NAME "IEC61970 16v29a - IEC61968 12v08")
 else()
   message(FATAL_ERROR "${USE_CIM_VERSION} is an invalid value for USE_CIM_VERSION")
 endif()