http://b/277579939 remove pandarallel which is flaky and breaking tests

Author: djherbis

Dockerfile.tmpl

@@ -541,7 +541,6 @@ RUN pip install pytorch-ignite \
         easyocr \
         # ipympl adds interactive widget support for matplotlib
         ipympl==0.7.0 \
-        pandarallel \
         onnx \
         tables \
         openpyxl \