chore(deps): bumped celery to 5.3.6 and kombu to latest version

requirements.txt

@@ -9,8 +9,8 @@ alembic==1.12.1
 async-timeout==4.0.3
 babel==2.12.1
 beaker==1.12.1
-celery==5.3.4
-  billiard==4.1.0
+celery==5.3.6
+  billiard==4.2.0
   click==8.1.3
   click-didyoumean==0.3.0
     click==8.1.3
@@ -21,8 +21,8 @@ celery==5.3.4
     prompt-toolkit==3.0.38
       wcwidth==0.2.6
     six==1.16.0
-  kombu==5.3.2
-    amqp==5.1.1
+  kombu==5.3.5
+    amqp==5.2.0
       vine==5.1.0
     vine==5.1.0
   python-dateutil==2.8.2

rhodecode/lib/celerylib/__init__.py

@@ -46,7 +46,6 @@ def run_task(task, *args, **kwargs):
     if task is None:
         raise ValueError(f'Got non-existing task: {task} for execution')
 
-    exec_mode = 'sync'
     allow_async = True
 
     # if we're already in a celery task, don't allow async execution again