With addition of pip_install on every node, we don't
need to have pip_install as a meta dependency.
Depends-On: If3412bb888ebb854874bbc43eb76bfcb3e4a7868
Depends-On: I79ff70c438b44753be2a93f004ebbc46de0a963d
Change-Id: Ie72283fc39355bb798a90ce3347a197d1b8e5e37