chore(lazer) Remove staging (#818)

Author: aditya520

pages/lazer/subscribe-price-updates.mdx

@@ -10,9 +10,7 @@ Subscribing to price updates is a three-step process:
 2. **Configure** subscription parameters.
 3. **Subscribe** to the price updates via [websocket API](https://pyth-lazer.dourolabs.app/docs).
 
-The websocket server is available at
-`wss://pyth-lazer.dourolabs.app/v1/stream{:bash}` for production and
-`wss://pyth-lazer-staging.dourolabs.app/v1/stream{:bash}` for staging.
+The websocket server is available at `wss://pyth-lazer.dourolabs.app/v1/stream{:bash}`.
 
 <Steps>