Remove Courses URL shortcut. #1575

Job	Run time
set_sites	39s
lint_theme	41s
test_phpunit	1m 33s
test_new_site	8m 41s
test_existing_site (duboislab)	5m 31s
test_existing_site (gavin_wright__humsci)	5m 7s
test_existing_site (hs_colorful)	7m 33s
test_existing_site (hs_sandbox)	1m 33s
test_existing_site (humanrights)	9m 53s
test_existing_site (islamicstudies)	6m 41s
test_existing_site (philosophy)	7m 12s
test_existing_site (sgs)	9m 17s
test_existing_site (sociology)	7m 6s
test_existing_site (tessier_lavigne_lab)	5m 36s
deploy_branch	0s
	1h 17m 3s

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