Remove dependencies

 Removes chainconsumer and following requirements. These where causing
the CI to be very slow. Instead, rather than plotting, just list a
warning.
2 jobs for adding-new-tests in 10 minutes and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #80848
exitcode-jessie

00:10:41

 
  Deploy
skipped #80849
pages
 
Name Stage Failure
failed
exitcode-jessie Test
CalledProcessError: Command '['python', 'examples/injection_examples/basic_tutorial.py', '--test']' returned non-zero exit status 1

----------------------------------------------------------------------
Ran 1 test in 117.694s

FAILED (errors=1)
Coverage.py warning: No data was collected. (no-data-collected)
Testing examples/injection_examples/basic_tutorial.py
ERROR: Job failed: exit code 1