ci: remove add_pmbootstrap_to_import_path

Unused since the previous commit

Signed-off-by: Pablo Correa Gómez <pabloyoyoista@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7868>

.ci/lib/add_pmbootstrap_to_import_path

@@ -1 +0,0 @@
-../testcases/add_pmbootstrap_to_import_path

.ci/testcases/add_pmbootstrap_to_import_path/__init__.py

@@ -1,44 +0,0 @@
-#!/usr/bin/env python3
-# Copyright 2021 Oliver Smith
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-import shutil
-import sys
-import os
-import importlib
-import importlib.util
-from site import getsitepackages
-
-
-def path_pmbootstrap():
-    """ Find the pmbootstrap installation folder, so we can import the Python
-        code from there.
-        returns: pmbootstrap installation folder
-    """
-    # This variable is set by pmbootstrap 1.52 and later
-    # If it's undefined, try to find 'pmbootstrap' in path
-    bin = os.environ.get("PMBOOTSTRAP_CMD") or shutil.which("pmbootstrap")
-
-    if not bin:
-        print("ERROR: 'pmbootstrap' not found in $PATH")
-        sys.exit(1)
-
-    # Resolve the symlink and verify the folder
-    directory = os.path.dirname(os.path.realpath(bin))
-    if os.path.exists(directory + "/pmb/__init__.py"):
-        return directory
-
-    directories = getsitepackages()
-    for directory in directories:
-        if os.path.exists(directory + "/pmb/__init__.py"):
-            return directory
-
-    # Symlink not set up properly
-    print("ERROR: unable to find path to pmbootstrap.py. Try setting 'PMBOOTSTRAP_CMD'.")
-    sys.exit(1)
-
-
-# Check if pmb module can be imported
-if importlib.util.find_spec("pmb") is None:
-    # Add pmbootstrap dir to import path
-    sys.path.append(os.path.realpath(path_pmbootstrap()))