Drop procedure (w/o behavior)

BigQueryDb2 (LUW)MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite200520072009201120132015201720192021⊘ 3.5.7 - 3.39.0✓ 2017+⊘ 2008R2 - 2016✓ 11+⊘ 8.3 - 10✓ 18c+⊘ 11gR1 - 12cR2✓ 5.0+✓ 5.1+✓ 11.1+⊘ 9.7 - 10.5✓ 2.0+