[conda] remove bob-devel from test requirements [skip ci]

3 jobs for master in 2 minutes and 57 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #245531
docker
build_linux_38

00:02:48

failed #245530
intel macos
build_macos_intel_38

00:02:33

 
  Deploy
skipped #245532
docker
deploy_beta
 
Name Stage Failure
failed
build_linux_38 Build
  File "/scratch/builds/bob/bob.db.atnt/miniconda/envs/bdt/lib/python3.8/site-packages/conda_build/variants.py", line 291, in _combine_spec_dictionaries
values[k] = v.copy()
AttributeError: 'str' object has no attribute 'copy'
Uploading artifacts for failed job
Uploading artifacts...
WARNING: coverage.xml: no matching files
ERROR: No files to upload
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
build_macos_intel_38 Build
    values[k] = v.copy()
AttributeError: 'str' object has no attribute 'copy'
Uploading artifacts for failed job
Uploading artifacts...
Runtime platform
arch=amd64 os=darwin pid=17720 revision=b37d3da9 version=14.3.0
WARNING: coverage.xml: no matching files
ERROR: No files to upload
Cleaning up project directory and file based variables
ERROR: Job failed: exit status 1