chore(ingest/snowflake): remove unused query code

[hsheth2]

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
2458	1	2457	47

View the top 1 failed test(s) by shortest run time

tests.unit.test_dagster::test_emit_metadata

Stack Traces | 0.838s run time

Metadata files differ (use `pytest --update-golden-files` to update):
Urn changed, urn:li:dataProcessInstance:0fa780ff92120ac3bf49d0bc070bbda2:
<dataProcessInstanceProperties> changed:
	Value of aspect['customProperties']['execution_plan_snapshot_id'] changed from "0f504b218cd28750ffa8d90a40e9647acba72021" to "834efb7cde870e3a78a6a8249c14733e089b7470".

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