removed duplicate variable specification

[AndrewEichmann-NOAA]

Tweak to recent refactor of vrfy task - made it so that config for plotter classes had variable specified only once, instead of twice when setting the colorbar bounds

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: hera

Start: Mon Aug  7 22:19:55 UTC 2023 on hfe07
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Mon Aug  7 23:21:27 UTC 2023
---------------------------------------------------
Tests:                                  *Failed*
Tests: Failed at Mon Aug  7 23:34:35 UTC 2023
Tests: 89% tests passed, 6 tests failed out of 53
	1588 - test_gdasapp_atm_jjob_var_init (Failed)
	1589 - test_gdasapp_atm_jjob_var_run (Failed)
	1590 - test_gdasapp_atm_jjob_var_final (Failed)
	1592 - test_gdasapp_atm_jjob_ens_run (Failed)
	1593 - test_gdasapp_atm_jjob_ens_final (Failed)
Tests: see output at /scratch1/NCEPDEV/da/Cory.R.Martin/CI/GDASApp/workflow/PR/551/global-workflow/sorc/gdas.cd/build/log.ctest

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: orion

Start: Mon Aug  7 17:17:22 CDT 2023 on Orion-login-1.HPC.MsState.Edu
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Mon Aug  7 18:27:19 CDT 2023
---------------------------------------------------
Tests:                                  *Failed*
Tests: Failed at Mon Aug  7 18:47:04 CDT 2023
Tests: 89% tests passed, 6 tests failed out of 53
	1588 - test_gdasapp_atm_jjob_var_init (Failed)
	1589 - test_gdasapp_atm_jjob_var_run (Failed)
	1590 - test_gdasapp_atm_jjob_var_final (Failed)
	1592 - test_gdasapp_atm_jjob_ens_run (Failed)
	1593 - test_gdasapp_atm_jjob_ens_final (Failed)
Tests: see output at /work2/noaa/stmp/cmartin/CI/GDASApp/workflow/PR/551/global-workflow/sorc/gdas.cd/build/log.ctest

[guillaumevernieres]

👍