python3Packages.setuptoolsBuildHook: delete broken setuptoolsShellHook

Broken since the switch to PyPA's build/installer in
6c85fff302.

The hook was always janky and maintainers appear to not want its current
implementation in-tree. No replacement is currently planned.

However, this leaves the path open for future replacements as a broken
hook will no longer be installed by default.

pkgs/development/interpreters/python/hooks/default.nix

@@ -194,7 +194,7 @@ in {
       name = "setuptools-setup-hook";
       propagatedBuildInputs = [ setuptools wheel ];
       substitutions = {
-        inherit pythonInterpreter pythonSitePackages setuppy;
+        inherit pythonInterpreter setuppy;
       };
     } ./setuptools-build-hook.sh) {};
 

pkgs/development/interpreters/python/hooks/setuptools-build-hook.sh

@@ -23,36 +23,7 @@ setuptoolsBuildPhase() {
     echo "Finished executing setuptoolsBuildPhase"
 }
 
-setuptoolsShellHook() {
-    echo "Executing setuptoolsShellHook"
-    runHook preShellHook
-
-    if test -e setup.py; then
-        tmp_path=$(mktemp -d)
-        export PATH="$tmp_path/bin:$PATH"
-        export PYTHONPATH="$tmp_path/@pythonSitePackages@:$PYTHONPATH"
-        mkdir -p "$tmp_path/@pythonSitePackages@"
-        eval "@pythonInterpreter@ -m pip install -e . --prefix $tmp_path \
-          --no-build-isolation >&2"
-
-        # Process pth file installed in tmp path. This allows one to
-        # actually import the editable installation. Note site.addsitedir
-        # appends, not prepends, new paths. Hence, it is not possible to override
-        # an existing installation of the package.
-        # https://github.com/pypa/setuptools/issues/2612
-        export NIX_PYTHONPATH="$tmp_path/@pythonSitePackages@:${NIX_PYTHONPATH-}"
-    fi
-
-    runHook postShellHook
-    echo "Finished executing setuptoolsShellHook"
-}
-
 if [ -z "${dontUseSetuptoolsBuild-}" ] && [ -z "${buildPhase-}" ]; then
     echo "Using setuptoolsBuildPhase"
     buildPhase=setuptoolsBuildPhase
 fi
-
-if [ -z "${dontUseSetuptoolsShellHook-}" ] && [ -z "${shellHook-}" ]; then
-    echo "Using setuptoolsShellHook"
-    shellHook=setuptoolsShellHook
-fi