Cleanup stock tool sources parsed in galaxy.tools.stock. #3492

Job	Run time
build-client / build-client	19s
setup-selenium / setup_chromedriver	4s
Test (3.8, 0)	41m 5s
Test (3.8, 1)	52m 38s
Test (3.8, 2)	49m 58s
	2h 24m 4s

Provide feedback