more clippy fixes:

clippy::search_is_some
clippy::redundant_static_lifetimes
clippy::match_single_binding
clippy::match_ref_pats
clippy::map_entry
clippy::manual_map
clippy::iter_overeager_cloned
clippy::into_iter_on_ref
clippy::extra_unused_lifetimes

crates/syntax/src/ast/expr_ext.rs

@@ -392,10 +392,8 @@ impl AstNode for CallableExpr {
     {
         if let Some(it) = ast::CallExpr::cast(syntax.clone()) {
             Some(Self::Call(it))
-        } else if let Some(it) = ast::MethodCallExpr::cast(syntax) {
-            Some(Self::MethodCall(it))
         } else {
-            None
+            ast::MethodCallExpr::cast(syntax).map(Self::MethodCall)
         }
     }