fix: resolve more clippy warnings

- Remove reference patterns in query.rs match statements
- Fix unneeded return statements in net/tls/mod.rs
- Remove explicit deref in postgres/column.rs
- Revert redundant closure fix that caused compilation error

Author: cursoragent

sqlx-core/src/net/tls/mod.rs

@@ -147,7 +147,7 @@ where
                 {
                     let raw = stream.into_inner().0;
                     *self = MaybeTlsStream::Raw(raw);
-                    return Ok(());
+                    Ok(())
                 }
 
                 #[cfg(feature = "_tls-native-tls")]
@@ -159,11 +159,11 @@ where
 
             MaybeTlsStream::Raw(stream) => {
                 *self = MaybeTlsStream::Raw(stream);
-                return Ok(());
+                Ok(())
             }
 
             MaybeTlsStream::Upgrading => {
-                return Err(Error::Io(io::ErrorKind::ConnectionAborted.into()));
+                Err(Error::Io(io::ErrorKind::ConnectionAborted.into()))
             }
         }
     }

sqlx-core/src/postgres/column.rs

@@ -24,7 +24,7 @@ impl Column for PgColumn {
     }
 
     fn name(&self) -> &str {
-        &*self.name
+        &self.name
     }
 
     fn type_info(&self) -> &PgTypeInfo {

sqlx-core/src/query.rs

@@ -44,14 +44,14 @@ where
     #[inline]
     fn sql(&self) -> &'q str {
         match self.statement {
-            Either::Right(ref statement) => statement.sql(),
+            Either::Right(statement) => statement.sql(),
             Either::Left(sql) => sql,
         }
     }
 
     fn statement(&self) -> Option<&<DB as HasStatement<'q>>::Statement> {
         match self.statement {
-            Either::Right(ref statement) => Some(statement),
+            Either::Right(statement) => Some(statement),
             Either::Left(_) => None,
         }
     }
@@ -293,7 +293,7 @@ where
         let mut f = self.mapper;
         Map {
             inner: self.inner,
-            mapper: move |row| f(row).and_then(g),
+            mapper: move |row| f(row).and_then(|o| g(o)),
         }
     }