Remove untrusted_runner code from setup.

It's not used anymore.

src/clusterfuzz/_internal/bot/tasks/setup.py

@@ -286,11 +286,6 @@ def setup_testcase(testcase: data_types.Testcase, job_type: str,
   if environment.is_android():
     _copy_testcase_to_device_and_setup_environment(testcase, testcase_file_path)
 
-  # Push testcases to worker.
-  if take_trusted_host_path():
-    from clusterfuzz._internal.bot.untrusted_runner import file_host
-    file_host.push_testcases_to_worker()
-
   # Copy global blacklist into local blacklist.
   if setup_input.global_blacklisted_functions:
     # Get local blacklist without this testcase's entry.
@@ -467,12 +462,6 @@ def _prepare_update_data_bundle(fuzzer, data_bundle):
   return data_bundle_directory
 
 
-def take_trusted_host_path():
-  if environment.is_uworker():
-    return False
-  return environment.is_trusted_host()
-
-
 def update_data_bundle(
     fuzzer: data_types.Fuzzer,
     data_bundle_corpus: uworker_msg_pb2.DataBundleCorpus) -> bool:  # pylint: disable=no-member
@@ -491,26 +480,9 @@ def update_data_bundle(
   # case, the fuzzer will generate testcases from a gcs bucket periodically.
   if not _is_search_index_data_bundle(data_bundle.name):
 
-    if not (take_trusted_host_path() and data_bundle.sync_to_worker):
-      logs.info('Data bundles: normal path.')
-      result = corpus_manager.sync_data_bundle_corpus_to_disk(
-          data_bundle_corpus, data_bundle_directory)
-    else:
-      logs.info('Data bundles: untrusted runner path.')
-      from clusterfuzz._internal.bot.untrusted_runner import \
-          corpus_manager as untrusted_corpus_manager
-      from clusterfuzz._internal.bot.untrusted_runner import file_host
-      worker_data_bundle_directory = file_host.rebase_to_worker_root(
-          data_bundle_directory)
-
-      file_host.create_directory(
-          worker_data_bundle_directory, create_intermediates=True)
-      result = untrusted_corpus_manager.RemoteGSUtilRunner().rsync(
-          data_bundle_corpus.gcs_url,
-          worker_data_bundle_directory,
-          delete=False)
-      result = result.return_code == 0
-
+    logs.info('Data bundles: normal path.')
+    result = corpus_manager.sync_data_bundle_corpus_to_disk(
+        data_bundle_corpus, data_bundle_directory)
     if not result:
       logs.error(f'Failed to sync data bundle {data_bundle.name}.')
       return False
@@ -522,11 +494,6 @@ def update_data_bundle(
   #  Write last synced time in the sync file.
   sync_file_path = _get_data_bundle_sync_file_path(data_bundle_directory)
   utils.write_data_to_file(time_before_sync_start, sync_file_path)
-  if take_trusted_host_path() and data_bundle.sync_to_worker:
-    from clusterfuzz._internal.bot.untrusted_runner import file_host
-    worker_sync_file_path = file_host.rebase_to_worker_root(sync_file_path)
-    file_host.copy_file_to_worker(sync_file_path, worker_sync_file_path)
-
   return True
 
 
@@ -697,13 +664,6 @@ def update_fuzzer_and_data_bundles(
 
     # For launcher script usecase, we need the entire fuzzer directory on the
     # worker.
-    if take_trusted_host_path():
-      from clusterfuzz._internal.bot.untrusted_runner import file_host
-      worker_fuzzer_directory = file_host.rebase_to_worker_root(
-          fuzzer_directory)
-      file_host.copy_directory_to_worker(
-          fuzzer_directory, worker_fuzzer_directory, replace=True)
-
   return fuzzer
 
 
@@ -717,12 +677,6 @@ def _is_data_bundle_up_to_date(data_bundle, data_bundle_directory):
   """Return true if the data bundle is up to date, false otherwise."""
   sync_file_path = _get_data_bundle_sync_file_path(data_bundle_directory)
 
-  if take_trusted_host_path() and data_bundle.sync_to_worker:
-    from clusterfuzz._internal.bot.untrusted_runner import file_host
-    worker_sync_file_path = file_host.rebase_to_worker_root(sync_file_path)
-    shell.remove_file(sync_file_path)
-    file_host.copy_file_from_worker(worker_sync_file_path, sync_file_path)
-
   if not os.path.exists(sync_file_path):
     return False