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

5 jobs for master in 37 minutes and 19 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #243432
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build_linux_37

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docker
build_linux_38

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intel macos
build_macos_intel_37

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intel macos
build_macos_intel_38

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  Deploy
passed #243434
docker
deploy_beta

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