Misc: Purge unused code and report startup error to host

src/common/dynamic_library.cpp

@@ -101,6 +101,15 @@ bool DynamicLibrary::Open(const char* filename, Error* error)
 #endif
 }
 
+void DynamicLibrary::Adopt(void* handle)
+{
+  AssertMsg(handle, "Handle is valid");
+
+  Close();
+
+  m_handle = handle;
+}
+
 void DynamicLibrary::Close()
 {
   if (!IsOpen())