Remove Me Groups

[vcai122]

We did a GSR refactor that removed the need for "Me" groups last year

• "Me" groups existed in the first place so we could treat booking GSRs for users the same as booking GSRs for groups.
• Turns out the logic can be optimized if we separate the use cases so we did just that in the GSR refactor, using group=None to just book the group for the given user.

This PR removes the the leftovers to erase the idea of "Me" groups completely from our codebase.

Also did a small refactor with a group membership view.

• Note: I checked iOS code and users (now /mymemberships), membership, and groups isn't used at all
  • We probably will never implement group feature. But its probably worth refactoring this code so that it makes sense, eventually. Since if we are going to keep it, might as well avoid confusion and make the business logic clear. Right now it is pretty messy.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.83%. Comparing base (f106b9b) to head (2d60616).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #323   +/-   ##
=======================================
  Coverage   90.83%   90.83%           
=======================================
  Files          63       63           
  Lines        2661     2629   -32     
=======================================
- Hits         2417     2388   -29     
+ Misses        244      241    -3     

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[tuneerroy]

LGTM! question: if we remove groups, how are we planning on supporting the Labs shared group?

[vcai122]

LGTM! question: if we remove groups, how are we planning on supporting the Labs shared group?

We aren't removing Groups. Groups are still alive and well. We are just removing the idea of "Me" groups as a singleton group, because we want to handle the logic of a single user booking with their own credits separately from group logic.

[tuneerroy]

LGTM! question: if we remove groups, how are we planning on supporting the Labs shared group?

We aren't removing Groups. Groups are still alive and well. We are just removing the idea of "Me" groups as a singleton group, because we want to handle the logic of a single user booking with their own credits separately from group logic.

oh yeah i realized. I read that we planned to remove groups eventually but think i just misread that.