Remove RegionBuilder and remaining references to region references

[rly]

Motivation

What was the reasoning behind this change? Please explain the changes briefly.

How to test the behavior?

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Checklist

• Did you update CHANGELOG.md with your changes?
• Does the PR clearly describe the problem and the solution?
• Have you reviewed our Contributing Guide?
• Does the PR use "Fix #XXX" notation to tell GitHub to close the relevant issue numbered XXX when the PR is merged?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.95%. Comparing base (a1af49d) to head (c951386).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1212   +/-   ##
=======================================
  Coverage   90.94%   90.95%           
=======================================
  Files          43       43           
  Lines        9522     9506   -16     
  Branches     2722     2719    -3     
=======================================
- Hits         8660     8646   -14     
+ Misses        569      568    -1     
+ Partials      293      292    -1     

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[rly]

Let's wait for hdmf-dev/hdmf-zarr#236 and NeurodataWithoutBorders/pynwb#1991 to be merged into dev and the tests here re-run and passing before merging this PR.

[rly]

The HDMF-Zarr tests are failing because it pins to an older version of pynwb that has not accounted for the removal of RegionBuilder. The tests pass locally when using the dev version of pynwb. We should be releasing a bugfix version of pynwb this week, so these tests will pass. We can merge this PR now or wait.

[mavaylon1]

The HDMF-Zarr tests are failing because it pins to an older version of pynwb that has not accounted for the removal of RegionBuilder. The tests pass locally when using the dev version of pynwb. We should be releasing a bugfix version of pynwb this week, so these tests will pass. We can merge this PR now or wait.

I will review this tomorrow and we can merge.