clippy: fix for_kv_map

and allow it in the one case where the entry loop is intended, but the
code is not yet implemented fully.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/server/report.rs

@@ -39,7 +39,7 @@ fn function_calls() -> Vec<(&'static str, fn() -> String)> {
             };
 
             let mut list = Vec::new();
-            for (store, _) in &config.sections {
+            for store in config.sections.keys() {
                 list.push(store.as_str());
             }
             list.join(", ")