remove dependency on tensorflow

8 jobs for master in 10 minutes and 44 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #63783
conda-linux
build_linux_27

00:02:22

passed #63784
conda-linux
build_linux_35

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  Test
passed #63837
conda-linux
test_linux_27

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passed #63785
conda-linux
test_linux_35

00:04:19

failed #63786
conda-linux
test_linux_27

00:00:29

 
  Docs
passed #63787
conda-linux
docs_linux_35

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  Wheels
passed #63789
conda-linux
wheels_linux_27

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passed #63788
conda-linux
wheels_linux_35

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