fix clippy warnings

database-tree/src/databasetree.rs

@@ -320,18 +320,14 @@ impl DatabaseTree {
     fn expand(&mut self, current_selection: usize) -> Option<usize> {
         let item = &mut self.items.tree_items.get(current_selection)?;
 
-        if item.kind().is_database() {
-            if item.kind().is_database_collapsed() {
-                self.items.expand(current_selection, false);
-                return Some(current_selection);
-            }
+        if item.kind().is_database() && item.kind().is_database_collapsed() {
+            self.items.expand(current_selection, false);
+            return Some(current_selection);
         }
 
-        if item.kind().is_schema() {
-            if item.kind().is_schema_collapsed() {
-                self.items.expand(current_selection, false);
-                return Some(current_selection);
-            }
+        if item.kind().is_schema() && item.kind().is_schema_collapsed() {
+            self.items.expand(current_selection, false);
+            return Some(current_selection);
         }
 
         None