chore(tox): remove psycopg2 from requirements

This package is already in the test image.
6 jobs for !29 with topic/default/new-pg11-image in 2 minutes and 22 seconds (queued for 2 seconds)
detached
Status Name Job ID Coverage
  Lint
passed check-manifest #394581

00:00:40

passed flake8 #394580

00:00:45

passed yamllint #394582

00:00:26

 
  Tests
failed py3 #475262

00:01:36

canceled py3 #475260

00:00:10

failed py3 #394583

00:01:21

 
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=475262 responseStatus=201 Created token=xMyJ-3wJ
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=475262 responseStatus=201 Created token=xMyJ-3wJ
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1