fix api_generator.py typo

Remove double assignment which linters haven't found before

Author: ssenchenko

samtranslator/model/api/api_generator.py

@@ -604,9 +604,7 @@ def _construct_single_record_set_group(
         hostedZoneId = route53.get("HostedZoneId")
         hostedZoneName = route53.get("HostedZoneName")
         domainName = domain.get("DomainName")
-        logical_id = logical_id = LogicalIdGenerator(
-            "RecordSetGroup", [hostedZoneId or hostedZoneName, domainName]
-        ).gen()
+        logical_id = LogicalIdGenerator("RecordSetGroup", [hostedZoneId or hostedZoneName, domainName]).gen()
 
         record_set_group = Route53RecordSetGroup(logical_id, attributes=self.passthrough_resource_attributes)
         if hostedZoneId: