Mitigate google/oss-fuzz#12519

It's caused by this exception
https://pantheon.corp.google.com/errors/detail/CNXrgouhptTW3QE;filter=%5B%22%5C%22Corpus%20pruning%20failed:%20%5BErrno%202%5D%20No%20such%20file%20or%20directory%5C%22%22%5D;locations=global?e=-13802955&mods=logs_tg_prod&project=google.com:clusterfuzz

Author: jonathanmetzman

src/clusterfuzz/_internal/bot/tasks/utasks/corpus_pruning_task.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """Corpus pruning task."""
-
 import collections
 import datetime
 import json
@@ -989,10 +988,11 @@ def utask_main(uworker_input):
     result = do_corpus_pruning(context, revision)
     issue_metadata = engine_common.get_fuzz_target_issue_metadata(fuzz_target)
     issue_metadata = issue_metadata or {}
-    _upload_corpus_crashes_zip(
-        result,
-        uworker_input.corpus_pruning_task_input.corpus_crashes_blob_name,
-        uworker_input.corpus_pruning_task_input.corpus_crashes_upload_url)
+    # TODO(metzman): Fix this issue.
+    # _upload_corpus_crashes_zip(
+    #     result,
+    #     uworker_input.corpus_pruning_task_input.corpus_crashes_blob_name,
+    #     uworker_input.corpus_pruning_task_input.corpus_crashes_upload_url)
     uworker_output = uworker_msg_pb2.Output(  # pylint: disable=no-member
         corpus_pruning_task_output=uworker_msg_pb2.CorpusPruningTaskOutput(  # pylint: disable=no-member
             coverage_info=_extract_coverage_information(context, result),