Code cleanup

src/metabase/api/card.clj

src/metabase/api/dataset.clj

src/metabase/db/metadata_queries.clj

src/metabase/driver.clj

src/metabase/driver/sqlserver.clj

src/metabase/models/card.clj

src/metabase/query_processor.clj

src/metabase/query_processor/middleware/expand.clj

...etabase/query_processor/middleware/fetch_source_query.clj

src/metabase/query_processor/middleware/resolve.clj

src/metabase/query_processor/middleware/resolve_driver.clj

src/metabase/query_processor/util.clj