Hi @bhanu_dp,
If I understood correctly, all the tables / objects in your HIVE METASTORE is now migrated to UC Catalog. If you have used UCX for migration, you might not see the process / workflow for removing the HIVE METASTORE from your workspace as of now, and this will be coming soon as part of UCX.
UCX Reference: https://docs.databricks.com/aws/en/data-governance/unity-catalog/ucx
But instead if you want to remove as of now, the below approach must be helpful, where under the hive_metastore -> ucx -> tables you can see the tables under your hive as shown in image below:

List down the tables under your ucx schema:
# Read table list from ucx metadata
table_df = spark.sql("SELECT database, name FROM hive_metastore.ucx.tables")
Iterate over the results with the below query to drop them from your hive_metastore.
# Iterate over tables and drop them
for row in table_df.collect():
schema_name = row["database"]
table_name = row["name"]
drop_query = f"DROP TABLE IF EXISTS hive_metastore.{schema_name}.{table_name}"
try:
spark.sql(drop_query)
print(f"Dropped table: {schema_name}.{table_name}")
except Exception as e:
print(f"Failed to drop table {schema_name}.{table_name}: {e}")
PS: Inorder to leverage this approach your workspace you have UCX installed to capture the metadata details. Follow this link to install UCX in your workspace / all for workspaces in your databricks account: https://databrickslabs.github.io/ucx/docs/installation/
Please let us know if you found this helpful / or if more guidance is required.
Best Regards,
Nivethan V