App blocks if SENTRY_URL is not given

[yausername]

Steps to reproduce -

• turn off network
• start app (python api.py)
• curl http://localhost:3000/data.json
• app is now blocked, cannot serve any clients even if network is turned on.

This seems like a raven issue

[TheAssassin]

I've been using this software without sentry successfully.

Try removing the two lines in

web-api/api.py

Lines 277 to 278 in 01db112

	else:
	app.sentry_client = AsyncSentryClient()

, but actually it shouldn't be needed.