chore(tox): remove psycopg2 from requirements

This package is already in the test image.
4 jobs for branch/default in 55 seconds (queued for 9 seconds)
Status Name Job ID Coverage
  Lint
passed check-manifest #475275
lint check-manifest

00:00:22

passed flake8 #475274
lint flake8

00:00:31

passed yamllint #475276
lint yamllint

00:00:16

 
  Tests
failed py3 #475277
tests py3

00:00:54

 
Name Stage Failure
failed
py3 Tests
Uploading artifacts for failed job
Uploading artifacts...
py3-deprecated-warnings.json: found 1 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=475277 responseStatus=201 Created token=1ZLZAeG7
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=475277 responseStatus=201 Created token=1ZLZAeG7
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1