Removes instantiations superfluous due to specialisation

Thanks to clang-8.0 for being the first compiler to remind of this.
27 jobs for mohr/ElementwiseOperators-mergeCandidate in 105 minutes and 25 seconds (queued for 3 seconds)
Name Stage Failure
failed
benchmark_intel19 Test
**  4.  /root/intel/licenses
** 5. /opt/intel/licenses
** 6. /Users/Shared/Library/Application Support/Intel/Licenses
** 7. /opt/intel/compilers_and_libraries_2019.4.243/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_19_mpionly_dbg Test
**  4.  /root/intel/licenses
** 5. /opt/intel/licenses
** 6. /Users/Shared/Library/Application Support/Intel/Licenses
** 7. /opt/intel/compilers_and_libraries_2019.4.243/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_17_mpionly_dbg Test
**  3.  /root/Licenses
** 4. /opt/intel/licenses/USE_SERVER.lic
** 5. /Users/Shared/Library/Application Support/Intel/Licenses
** 6. /opt/intel/compilers_and_libraries_2017.8.262/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_19_hybrid_dbg_sp Test
**  4.  /root/intel/licenses
** 5. /opt/intel/licenses
** 6. /Users/Shared/Library/Application Support/Intel/Licenses
** 7. /opt/intel/compilers_and_libraries_2019.4.243/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_19_eigen_petsc Test
**  4.  /root/intel/licenses
** 5. /opt/intel/licenses
** 6. /Users/Shared/Library/Application Support/Intel/Licenses
** 7. /opt/intel/compilers_and_libraries_2019.4.243/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_18_serial_dbg Test
**  3.  /root/Licenses
** 4. /opt/intel/licenses
** 5. /Users/Shared/Library/Application Support/Intel/Licenses
** 6. /opt/intel/compilers_and_libraries_2018.5.274/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1
failed
intel_19_serial_dbg Test
**  4.  /root/intel/licenses
** 5. /opt/intel/licenses
** 6. /Users/Shared/Library/Application Support/Intel/Licenses
** 7. /opt/intel/compilers_and_libraries_2019.4.243/linux/bin/intel64/*.lic

Please refer http://software.intel.com/sites/support/ for more information..

icpc: error #10052: could not checkout FLEXlm license
ERROR: Job failed: exit code 1