remove unused python3.6-da dev-env bin (#3845)

dev-env/bin/python3.6-da

@@ -1,76 +0,0 @@
-#!/usr/bin/env bash
-
-# This is a helper script for running python scripts in DA environment. It relies on presence of Nix.
-# To use it, reference it in shebang line. Then, if you need some additional, non-standard python packages,
-# reference them on the second shebang line:
-#
-# #!/usr/bin/env python3.6-da
-# #! python3.6-da pyyaml semver GitPython
-#
-
-# - check if invoked via shebang line
-# - check if the second line is present
-#   - if second line is present, prepare environment
-#   - if not, just invoke python3.6
-
-# invoked via shebang line:
-# - one argument, which is either name of this script (via /usr/bin/env)
-# - or $0 which is the name of the script
-
-# get the standard DA preamble for dev-env
-set -e
-BIN_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-source "$BIN_DIR/../lib/dade-common"
-
-script_name='python3.6-da'
-
-if [[ $0 =~ ${script_name}$ && $1 ]]; then
-    # it's called from shebang, we need to parse the file
-    args=()
-    script=$1
-    if [[ -f "$script" && -x "$script" ]]; then
-        in_shebang=0
-        first=1
-        regex="^\#\! *${script_name} "
-        ends_with_script="${script_name}$"
-        while read -r line
-        do
-            if (( first )); then
-                if [[ $line =~ ^\#\! ]]; then
-                    in_shebang=1
-                    first=0
-                    continue
-                fi
-            fi
-            if [[ $in_shebang && $line =~ $regex ]]; then
-                # need to skip over shebang and script name
-                do_add=0
-                for item in $line;
-                do
-                    if (( do_add )); then
-                        args+=($item)
-                    elif [[ $item =~ $ends_with_script ]]; then
-                        do_add=1
-                    fi
-                done
-            elif (( in_shebang )); then
-                break
-            fi
-        done < "$script"
-    fi
-    if [[ -z "${args[@]}" ]]; then
-        # with empty array just call python36
-        execTool python36 out python3.6 "$@"
-    else
-        # otherwise construct args and bootstrap packages
-        # We use Python to turn the positional arguments to this script into a
-        # string that we can pass to the --run command below. This is
-        # necessary to handle things like spaces in filenames.
-        cmd_args=$(python3 -c 'import sys, shlex; print(" ".join(map(shlex.quote, sys.argv[1:])))' "$@")
-        nix="$BIN_DIR/../../nix"
-        nix-shell -p "with import $nix/nixpkgs.nix { }; nixpkgs.pkgs.python36.withPackages(ps: with ps; [ ${args[*]} ])" --run "python3.6 $cmd_args"
-    fi
-else
-    # not called, just invoke python3.6 with no bells and whistles
-    execTool python36 out python3.6 "$@"
-fi

nix/packages.nix

@@ -253,11 +253,6 @@ in rec {
 
   # Set of packages that we want Hydra to build for us
   cached = bazel_dependencies // {
-    # Python packages used via 'python3.6-da'.
-    pythonPackages = {
-      inherit (pkgs.python37Packages)
-        pyyaml semver GitPython;
-    };
     # Packages used in command-line tools
     cli-tools = {
       inherit (pkgs) coreutils nix-info getopt;