Revert "Configurable flickering screen for random signal"

To unlink submodule scenejs

This reverts commit bfe4888155ff758c7abf9e00b5e0f3635f8ab2e6.

Conflicts:
	unlock/admin/admin/template/random.html
Configurable flickering screen for random signal
http://localhost:5000/random?frate=<flickering rate in Hertz>