hle: service: nvflinger: buffer_queue_core: Cleanup & fixes.

src/core/hle/service/nvflinger/buffer_queue_core.cpp

@@ -95,7 +95,6 @@ void BufferQueueCore::FreeBufferLocked(s32 slot) {
 }
 
 void BufferQueueCore::FreeAllBuffersLocked() {
-    queue.clear();
     buffer_has_been_queued = false;
 
     for (s32 slot = 0; slot < BufferQueueDefs::NUM_BUFFER_SLOTS; ++slot) {

src/core/hle/service/nvflinger/buffer_queue_core.h

@@ -73,8 +73,6 @@ private:
     u32 transform_hint{};
     bool is_allocating{};
     mutable std::condition_variable_any is_allocating_condition;
-    bool allow_allocation{true};
-    u64 buffer_age{};
     bool is_shutting_down{};
 };