remove unsed import

Author: Cheng-Yuan-Lai

datafusion/functions/src/crypto/digest.rs

@@ -19,7 +19,7 @@
 use super::basic::{digest, utf8_or_binary_to_binary_type};
 use arrow::datatypes::DataType;
 use datafusion_common::{
-    types::{logical_binary, logical_string, NativeType},
+    types::{logical_binary, logical_string},
     Result,
 };
 use datafusion_expr::{

datafusion/functions/src/crypto/sha256.rs

@@ -59,11 +59,8 @@ impl SHA256Func {
         Self {
             signature: Signature::new(
                 TypeSignature::Coercible(vec![Coercion::new_implicit(
-                    TypeSignatureClass::Native(logical_binary()),
-                    vec![
-                        TypeSignatureClass::Native(logical_string()),
-                        TypeSignatureClass::Native(logical_binary()),
-                    ],
+                    TypeSignatureClass::Native(logical_string()),
+                    vec![TypeSignatureClass::Native(logical_binary())],
                     NativeType::Binary,
                 )]),
                 Volatility::Immutable,