pocket: reuse pockexport data access layer

BREAKING CHANGE! Data parsing was switched to pockexport.
This would help to keep it consistent across different apps in the future.

When you update, you'll need to:

- clone pockexport (latest version)
- set pockexport repository in your config (see doc/MODULES.org)

my/hypothesis.py

@@ -58,8 +58,6 @@ def _dal() -> dal.DAL:
     return dal.DAL(sources)
 
 
-
-
 def highlights() -> List[Res[Highlight]]:
     return sort_res_by(_dal().highlights(), key=lambda h: h.created)