change comments

Author: yzh211

.travis.yml

@@ -4,8 +4,6 @@ python:
   - "3.7"
   - "3.8"
 install:
-  # We do this conditionally because it saves us some downloading if the
-  # version is the same.
   - wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
   - bash miniconda.sh -b -p $HOME/miniconda
   - source "$HOME/miniconda/etc/profile.d/conda.sh"