Revert "Return subscription id when subscribing"

This reverts commit cfc0b1cdcea5f68d3dadd6770091fdf722453d60.
Revert "Subscribe in javascript"

This reverts commit 8ec9f404ebbe8966958e63090cd7d7e8b49453b2.
Revert "subscribe via http"

This reverts commit 44c872e1a25796156d1b811b1ecbe729d6fb6f25.