dropping duplicate columns #25

Job	Run time
linux-64-py3.10	6m 20s
estimation_edb_creation_test	4m 28s
develop-docbuild	0s
macOS	2m 43s
prototype_mtc	49m 43s
win-64	2m 26s
estimation_mode_test	18m 9s
Standard 1-Zone Example (MTC)	51m 48s
placeholder_psrc	43m 3s
Standard 2-Zone Example (SANDAG)	1h 6m 2s
prototype_marin	3m 2s
random_seed_generation_test	3m 58s
prototype_mtc_extended	1h 25m 48s
placeholder_sandag	1h 42m 26s
prototype_sandag_xborder	5m 55s
production_semcog	6m 31s
prototype_mwcog	50m 28s
placeholder_multiple_zone	9m 28s
	8h 32m 18s

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