use warn not deny

datafusion/src/lib.rs

@@ -14,7 +14,7 @@
 // KIND, either express or implied.  See the License for the
 // specific language governing permissions and limitations
 // under the License.
-#![warn(missing_docs)]
+#![warn(missing_docs, clippy::needless_borrow)]
 // Clippy lints, some should be disabled incrementally
 #![allow(
     clippy::float_cmp,
@@ -24,7 +24,6 @@
     clippy::type_complexity,
     clippy::upper_case_acronyms
 )]
-#![deny(clippy::needless_borrow)]
 
 //! [DataFusion](https://github.com/apache/arrow-datafusion)
 //! is an extensible query execution framework that uses