fixup! set versions

Author: mthrok

.circleci/unittest/linux/scripts/environment.yml

@@ -9,7 +9,6 @@ dependencies:
   - codecov
   - librosa=0.8.0
   - llvmlite==0.31  # See https://github.com/pytorch/audio/pull/766
-  - numpy=1.19.1
   - pip=20.2.3
   - pip:
     - kaldi-io==0.9.4