[core] Remove RunLoop::{ref,unref}

platform/default/run_loop.cpp

@@ -1,4 +1,3 @@
-#include <mbgl/platform/log.hpp>
 #include <mbgl/util/run_loop.hpp>
 #include <mbgl/util/async_task.hpp>
 #include <mbgl/util/thread_local.hpp>
@@ -73,8 +72,6 @@ public:
         return reinterpret_cast<uv_handle_t*>(holder);
     }
 
-    int refCount = 1;
-
     uv_loop_t *loop = nullptr;
     uv_async_t* holder = new uv_async_t;
 
@@ -164,28 +161,7 @@ void RunLoop::runOnce() {
 }
 
 void RunLoop::stop() {
-    invoke([&] {
-        unref();
-
-        if (impl->refCount) {
-            Log::Debug(mbgl::Event::General, "Blocking on pending events.");
-        }
-    });
-}
-
-void RunLoop::ref() {
-    ++impl->refCount;
-}
-
-void RunLoop::unref() {
-    // Main loop already stopped.
-    if (impl->refCount == 0) {
-        return;
-    }
-
-    if (!--impl->refCount) {
-        uv_unref(impl->holderHandle());
-    }
+    invoke([&] { uv_unref(impl->holderHandle()); });
 }
 
 void RunLoop::addWatch(int fd, Event event, std::function<void(int, Event)>&& callback) {