Revert "Embed cmark."

This reverts commit f35001112dc740ed827e4a4de6e4bb3d94b0e466

src/main.cpp

@@ -22,8 +22,6 @@
 #include "csapi/joining.h"
 #include "csapi/leaving.h"
 
-#include "qqmlsortfilterproxymodel.h"
-
 using namespace QMatrixClient;
 
 int main(int argc, char* argv[]) {
@@ -38,8 +36,6 @@ int main(int argc, char* argv[]) {
   app.setApplicationName("Spectral");
   app.setWindowIcon(QIcon(":/assets/img/icon.png"));
 
-  qmlRegisterType<qqsfpm::QQmlSortFilterProxyModel>("SortFilterProxyModel", 0,
-                                                    2, "SortFilterProxyModel");
   qmlRegisterType<Controller>("Spectral", 0, 1, "Controller");
   qmlRegisterType<AccountListModel>("Spectral", 0, 1, "AccountListModel");
   qmlRegisterType<RoomListModel>("Spectral", 0, 1, "RoomListModel");