Remove dagster-celery dep on dagster-k8s

Test Plan: buildkite, tested manually in a new clean venv

Reviewers: alangenfeld, catherinewu, schrockn

Reviewed By: schrockn

Subscribers: schrockn, max

Differential Revision: https://dagster.phacility.com/D3479

python_modules/libraries/dagster-celery/dagster_celery/engine.py

@@ -1,8 +1,6 @@
 import sys
 import time
 
-from dagster_k8s.job import get_k8s_resource_requirements
-
 from dagster import check
 from dagster.core.engine.engine_base import Engine
 from dagster.core.errors import DagsterSubprocessError
@@ -189,6 +187,8 @@ def _submit_task(app, pipeline_context, step, queue, priority):
 def _submit_task_k8s_job(app, pipeline_context, step, queue, priority):
     from .tasks import create_k8s_job_task
 
+    from dagster_k8s.job import get_k8s_resource_requirements
+
     resources = get_k8s_resource_requirements(step.tags)
     task = create_k8s_job_task(app)