Fix double enqueuing of upload jobs

The canonical place to call enqueue is in
https://github.com/galaxyproject/galaxy/blob/a5bb3e92667b96ef802b378f17788b253a5c0bc6/lib/galaxy/tools/execute.py#L127.
In the process of enqueue the db-skip-locked assignment method will set
the handler name to the default tag. If you do this more than once the
job might be picked up by compatible handlers.

Fixes #11335

lib/galaxy/tools/actions/history_imp_exp.py

@@ -67,11 +67,6 @@ def execute(self, tool, trans, incoming=None, set_output_hid=False, overwrite=Tr
             job.add_parameter(name, value)
 
         job.state = start_job_state  # job inputs have been configured, restore initial job state
-
-        # Queue the job for execution
-        trans.app.job_manager.enqueue(job, tool=tool)
-        trans.log_event("Added import history job to the job queue, id: %s" % str(job.id), tool_id=job.tool_id)
-
         return job, {}
 
 

lib/galaxy/tools/actions/upload_common.py

@@ -441,9 +441,6 @@ def create_job(trans, params, tool, json_file_path, outputs, folder=None, histor
             job.add_parameter(name, value)
     trans.sa_session.add(job)
 
-    # Queue the job for execution
-    trans.app.job_manager.enqueue(job, tool=tool)
-    trans.log_event("Added job to the job queue, id: %s" % str(job.id), tool_id=job.tool_id)
     output = {}
     for i, v in enumerate(outputs):
         if not hasattr(output_object, "collection_type"):