CTest: avoid marking undeclared cache variables as advanced

Modules/CTest.cmake

@@ -243,7 +243,6 @@ if(BUILD_TESTING)
 
   mark_as_advanced(
     BZRCOMMAND
-    BZR_UPDATE_OPTIONS
     COVERAGE_COMMAND
     COVERAGE_EXTRA_FLAGS
     CTEST_SUBMIT_RETRY_DELAY
@@ -257,13 +256,10 @@ if(BUILD_TESTING)
     MAKECOMMAND
     MEMORYCHECK_COMMAND
     MEMORYCHECK_SUPPRESSIONS_FILE
-    PURIFYCOMMAND
-    SCPCOMMAND
     SLURM_SBATCH_COMMAND
     SLURM_SRUN_COMMAND
     SITE
     SVNCOMMAND
-    SVN_UPDATE_OPTIONS
     )
   if(NOT RUN_FROM_DART)
     set(RUN_FROM_CTEST_OR_DART 1)