remove migration notes

www/migrate

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-* hack
-  - good
-* code
-  - this is actually a fair bit of work (maybe)
-* canvas
-  - seems to work
-  - should have json-ot
-* form
-  - doesn't work yet
-  - don't bother developing for websocket, move to netflux asap
-* p
-  - using sockets, pad is the fixed version
-  - move things over and deprecate
-* pad
-  - using netflux already, but might require some updates from /p/
-* padrtc
-  - using netflux, but it's not really useful
-* render
-  - idek man
-* style
-  - works, using netflux
-* text
-  - works
-
-
-## Remaining
-
-* code
-  - use netflux
-* form
-  - use netflux
-  - get it working
-  - audit json-ot
-* pad
-  - update /pad/ from /p/
-  - then delete p
-* p
-  - see above
-* padrtc
-  - idk
-* render
-  - get it working
-  - use diffdom
-  - continue to use rainbow?
-* style
-  - push initial styles into new documents
-* text
-  - support tabs?
-
-