update Dear ImGui to 1.92.0, part 2

TODO:
- testing
- testing
- testing
- additional testing
- extra testing

and of course:
- testing

src/gui/render/renderSoftware.cpp

@@ -105,22 +105,14 @@ void FurnaceGUIRenderSoftware::clear(ImVec4 color) {
   }
 }
 
-bool FurnaceGUIRenderSoftware::newFrame() {
-  return ImGui_ImplSW_NewFrame();
+void FurnaceGUIRenderSoftware::newFrame() {
+  ImGui_ImplSW_NewFrame();
 }
 
 bool FurnaceGUIRenderSoftware::canVSync() {
   return false;
 }
 
-void FurnaceGUIRenderSoftware::createFontsTexture() {
-  ImGui_ImplSW_CreateFontsTexture();
-}
-
-void FurnaceGUIRenderSoftware::destroyFontsTexture() {
-  ImGui_ImplSW_DestroyFontsTexture();
-}
-
 void FurnaceGUIRenderSoftware::renderGUI() {
   ImGui_ImplSW_RenderDrawData(ImGui::GetDrawData());
 }