Update JSONField in evaluate_couch_model_for_sql

(fields.W904) django.contrib.postgres.fields.JSONField is deprecated. Support for it (except in historical migrations) will be removed in Django 4.0.
	HINT: Use django.db.models.JSONField instead.

corehq/apps/cleanup/management/commands/evaluate_couch_model_for_sql.py

@@ -53,7 +53,7 @@ def add_arguments(self, parser):
     FIELD_TYPE_DATETIME = 'models.DateTimeField'
     FIELD_TYPE_DECIMAL = 'models.DecimalField'
     FIELD_TYPE_STRING = 'models.CharField'
-    FIELD_TYPE_JSON = 'JSONField'
+    FIELD_TYPE_JSON = 'models.JSONField'
     FIELD_TYPE_SUBMODEL_LIST = 'models.ForeignKey'
     FIELD_TYPE_SUBMODEL_DICT = 'models.OneToOneField'
     FIELD_TYPE_UNKNOWN = 'unknown_type'
@@ -289,7 +289,6 @@ def generate_models_changes(self):
         db_table = self.django_app.lower() + "_" + self.class_name.replace("_", "").lower()
         sql_model = render_tempate(
             "sql_model.j2",
-            import_json=self.FIELD_TYPE_JSON in self.field_types.values(),
             class_name=self.class_name,
             migration_field_names=migration_field_names,
             suggested_fields=suggested_fields,

corehq/apps/cleanup/management/commands/templates/sql_model.j2

@@ -1,6 +1,3 @@
-{% if import_json %}
-from django.contrib.postgres.fields import JSONField
-{%- endif %}
 from django.db import models
 from dimagi.utils.couch.migration import SyncCouchToSQLMixin, SyncSQLToCouchMixin