Remove unused code
Remove unused code

This active scenario tab logic changed in another PR and is no longer
used.

WikiWatershed/model-my-watershed,kdeloach/model-my-watershed,WikiWatershed/model-my-watershed,lliss/model-my-watershed,project-icp/bee-pollinator-app,lliss/model-my-watershed,kdeloach/model-my-watershed,lliss/model-my-watershed,WikiWatershed/model-my-watershed,mmcfarland/model-my-watershed,WikiWatershed/model-my-watershed,project-icp/bee-pollinator-app,kdeloach/model-my-watershed,lliss/model-my-watershed,WikiWatershed/model-my-watershed,project-icp/bee-pollinator-app,kdeloach/model-my-watershed,mmcfarland/model-my-watershed,mmcfarland/model-my-watershed,mmcfarland/model-my-watershed,project-icp/bee-pollinator-app,kdeloach/model-my-watershed,lliss/model-my-watershed,mmcfarland/model-my-watershed