removed query var; using is_sequence method; removed integration var (#3395)

tests/test_all_rules.py

@@ -964,10 +964,6 @@ class TestRuleTiming(BaseRuleTest):
             # QueryRuleData should inheritenly ignore machine learning rules
             if isinstance(rule.contents.data, QueryRuleData):
                 rule_language = rule.contents.data.language
-                rule_integrations = rule.contents.metadata.get('integration')
-                if isinstance(rule_integrations, str):
-                    rule_integrations = [rule_integrations]
-                rule_query = rule.contents.data.get('query')
                 has_event_ingested = rule.contents.data.get('timestamp_override') == 'event.ingested'
                 rule_str = self.rule_str(rule, trailer=None)
 
@@ -975,7 +971,7 @@ class TestRuleTiming(BaseRuleTest):
                     # TODO: determine if we expand this to ES|QL
                     # ignores any rule that does not use EQL or KQL queries specifically
                     # this does not avoid rule types where variants of KQL are used (e.g. new terms)
-                    if rule_language not in ('eql', 'kuery') or "sequence" in rule_query:
+                    if rule_language not in ('eql', 'kuery') or rule.contents.data.is_sequence:
                         continue
                     else:
                         errors.append(f'{rule_str} - rule must have `timestamp_override: event.ingested`')