Apply nightly clippy fixes (#9381)

# Description
New lints coming from `cargo +nightly clippy`

Manually checked for problems.


# User-Facing Changes
None

# Tests + Formatting
(-)

crates/nu-cmd-dataframe/src/dataframe/eager/sql_context.rs

@@ -18,7 +18,7 @@ impl SQLContext {
     pub fn new() -> Self {
         Self {
             table_map: HashMap::new(),
-            dialect: GenericDialect::default(),
+            dialect: GenericDialect,
         }
     }