CTest: Remove additional batch test variables

Follow up commit f984296ba8 (CTest: Remove unfinished batch test mode,
2017-12-08, v3.11.0-rc1~217^2).

Modules/CTest.cmake

@@ -179,12 +179,6 @@ if(BUILD_TESTING)
     "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Rational Software\\Purify\\Setup;InstallFolder]"
     DOC "Path to the memory checking command, used for memory error detection."
     )
-  find_program(SLURM_SBATCH_COMMAND sbatch DOC
-    "Path to the SLURM sbatch executable"
-    )
-  find_program(SLURM_SRUN_COMMAND srun DOC
-    "Path to the SLURM srun executable"
-    )
   set(MEMORYCHECK_SUPPRESSIONS_FILE "" CACHE FILEPATH
     "File that contains suppressions for the memory checker")
   find_program(COVERAGE_COMMAND gcov DOC
@@ -263,8 +257,6 @@ if(BUILD_TESTING)
     MAKECOMMAND
     MEMORYCHECK_COMMAND
     MEMORYCHECK_SUPPRESSIONS_FILE
-    SLURM_SBATCH_COMMAND
-    SLURM_SRUN_COMMAND
     SITE
     SVNCOMMAND
     )

Modules/DartConfiguration.tcl.in

@@ -83,10 +83,6 @@ MemoryCheckSuppressionFile: @MEMORYCHECK_SUPPRESSIONS_FILE@
 CoverageCommand: @COVERAGE_COMMAND@
 CoverageExtraFlags: @COVERAGE_EXTRA_FLAGS@
 
-# Cluster commands
-SlurmBatchCommand: @SLURM_SBATCH_COMMAND@
-SlurmRunCommand: @SLURM_SRUN_COMMAND@
-
 # Testing options
 # TimeOut is the amount of time in seconds to wait for processes
 # to complete during testing.  After TimeOut seconds, the