Update Dockerfile

Author: avikdatta

pi-test/Dockerfile

@@ -12,9 +12,8 @@ RUN useradd -m -s /bin/bash -N -u $NB_UID $NB_USER
 USER $NB_USER
 WORKDIR /home/$NB_USER
 
-RUN set -x && \
- mkdir -p /home/$NB_USER/.pyenv && \
- git clone https://github.com/yyuu/pyenv.git /home/$NB_USER/.pyenv
+RUN set -x \
+ && mkdir -p /home/$NB_USER/.pyenv
 
 USER root
 RUN [ "cross-build-end" ]