remove "pipeline_master"

it was renamed to "pipeline_main"

scripts/pipeline_master.py

@@ -1,49 +0,0 @@
-#!/usr/bin/env python3
-# Copyright 2020 Google LLC
-#
-# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://llvm.org/LICENSE.txt
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import os
-
-from steps import generic_linux, generic_windows, from_shell_output
-import yaml
-
-steps_generators = [
-    # TODO: enable when we have enough mac agents
-    # '${BUILDKITE_BUILD_CHECKOUT_PATH}/libcxx/utils/ci/buildkite-pipeline-snapshot.sh',
-]
-
-if __name__ == '__main__':
-    scripts_refspec = os.getenv("ph_scripts_refspec", "main")
-    no_cache = os.getenv('ph_no_cache') is not None
-    projects = os.getenv('ph_projects', 'clang;clang-tools-extra;libc;libcxx;libcxxabi;lld;libunwind;mlir;openmp;polly')
-    log_level = os.getenv('ph_log_level', 'WARNING')
-    notify_emails = list(filter(None, os.getenv('ph_notify_emails', '').split(',')))
-    steps = []
-    steps.extend(generic_linux(
-        os.getenv('ph_projects', 'clang;clang-tools-extra;libc;libcxx;libcxxabi;lld;libunwind;mlir;openmp;polly'),
-        False))
-    # FIXME: openmp is removed as it constantly fails.
-
-    # TODO: Make this project list be evaluated through "choose_projects"(? as now we define "all" and exclusions in
-    #  two placess).
-    steps.extend(generic_windows(
-        os.getenv('ph_projects', 'clang;clang-tools-extra;libc;libcxx;libcxxabi;lld;libunwind;mlir;polly')))
-
-    for gen in steps_generators:
-        steps.extend(from_shell_output(gen))
-
-    notify = []
-    for e in notify_emails:
-        notify.append({'email': e})
-    print(yaml.dump({'steps': steps, 'notify': notify}))