set to python-only by default

.build/Dockerfile

@@ -371,71 +371,6 @@ USER ${NB_UID}
 
 WORKDIR "${HOME}"
 
-  ############################################################################
-  ################ Dependency: jupyter/datascience-notebook ##################
-  ############################################################################
-
-# Copyright (c) Jupyter Development Team.
-# Distributed under the terms of the Modified BSD License.
-ARG OWNER=jupyter
-
-LABEL maintainer="Jupyter Project <jupyter@googlegroups.com>"
-
-# Fix: https://github.com/hadolint/hadolint/wiki/DL4006
-# Fix: https://github.com/koalaman/shellcheck/wiki/SC3014
-SHELL ["/bin/bash", "-o", "pipefail", "-c"]
-
-USER root
-
-# R pre-requisites
-RUN apt-get update --yes && \
-    apt-get install --yes --no-install-recommends \
-    fonts-dejavu \
-    gfortran \
-    gcc && \
-    apt-get clean && rm -rf /var/lib/apt/lists/*
-
-# Julia dependencies
-# install Julia packages in /opt/julia instead of ${HOME}
-ENV JULIA_DEPOT_PATH=/opt/julia \
-    JULIA_PKGDIR=/opt/julia
-
-# Setup Julia
-RUN /opt/setup-scripts/setup-julia.bash
-
-USER ${NB_UID}
-
-# Setup IJulia kernel & other packages
-RUN /opt/setup-scripts/setup-julia-packages.bash
-
-# R packages including IRKernel which gets installed globally.
-# r-e1071: dependency of the caret R package
-RUN mamba install --yes \
-    'r-base' \
-    'r-caret' \
-    'r-crayon' \
-    'r-devtools' \
-    'r-e1071' \
-    'r-forecast' \
-    'r-hexbin' \
-    'r-htmltools' \
-    'r-htmlwidgets' \
-    'r-irkernel' \
-    'r-nycflights13' \
-    'r-randomforest' \
-    'r-rcurl' \
-    'r-rmarkdown' \
-    'r-rodbc' \
-    'r-rsqlite' \
-    'r-shiny' \
-    'r-tidymodels' \
-    'r-tidyverse' \
-    'rpy2' \
-    'unixodbc' && \
-    mamba clean --all -f -y && \
-    fix-permissions "${CONDA_DIR}" && \
-    fix-permissions "/home/${NB_USER}"
-
 ############################################################################
 ########################## Dependency: gpulibs #############################
 ############################################################################