Remove superfluous "has" function

src/hydra-queue-runner/hydra-queue-runner.cc

@@ -249,7 +249,7 @@ void getDependents(Step::ptr step, std::set<Build::ptr> & builds, std::set<Step:
     std::function<void(Step::ptr)> visit;
 
     visit = [&](Step::ptr step) {
-        if (has(steps, step)) return;
+        if (steps.count(step)) return;
         steps.insert(step);
 
         std::vector<Step::wptr> rdeps;

src/hydra-queue-runner/queue-monitor.cc

@@ -89,7 +89,7 @@ bool State::getQueuedBuilds(Connection & conn, std::shared_ptr<StoreAPI> store,
             BuildID id = row["id"].as<BuildID>();
             if (buildOne && id != buildOne) continue;
             if (id > newLastBuildId) newLastBuildId = id;
-            if (has(*builds_, id)) continue;
+            if (builds_->count(id)) continue;
 
             auto build = std::make_shared<Build>();
             build->id = id;

src/hydra-queue-runner/state.hh

@@ -439,10 +439,3 @@ public:
 
     void run(BuildID buildOne = 0);
 };
-
-
-template <class C, class V>
-bool has(const C & c, const V & v)
-{
-    return c.find(v) != c.end();
-}