Removed unnecessary mutex

include/siadrive_api/siaapi.h

@@ -171,7 +171,6 @@ public:
 	private:
     _SiaRenterAllowance _currentAllowance;
     std::shared_ptr<_CSiaFileTree> _fileTree;
-    std::mutex _fileTreeMutex;
 
 	private:
 		void Refresh(const CSiaCurl& siaCurl, CSiaDriveConfig* siaDriveConfig);

src/siadrive_api/siarenter.cpp

@@ -142,11 +142,8 @@ SiaApiError CSiaApi::_CSiaRenter::RefreshFileTree( )
   if (ApiSuccess(cerror))
   {
     tempTree->BuildTree(result);
-    {
-      std::lock_guard<std::mutex> l(_fileTreeMutex);
      _fileTree = tempTree;
   }
-  }
   else
   {
     ret = { SiaApiErrorCode::RequestError, cerror.GetReason() };