Core: Purge WITH_IMGUI define

src/core/gpu.cpp

@@ -7,15 +7,13 @@
 #include "dma.h"
 #include "host_display.h"
 #include "host_interface.h"
+#include "imgui.h"
 #include "interrupt_controller.h"
 #include "settings.h"
 #include "stb_image_write.h"
 #include "system.h"
 #include "timers.h"
 #include <cmath>
-#ifdef WITH_IMGUI
-#include "imgui.h"
-#endif
 Log_SetChannel(GPU);
 
 std::unique_ptr<GPU> g_gpu;
@@ -1553,7 +1551,6 @@ bool GPU::DumpVRAMToFile(const char* filename, u32 width, u32 height, u32 stride
 
 void GPU::DrawDebugStateWindow()
 {
-#ifdef WITH_IMGUI
   const float framebuffer_scale = ImGui::GetIO().DisplayFramebufferScale.x;
 
   ImGui::SetNextWindowSize(ImVec2(450.0f * framebuffer_scale, 550.0f * framebuffer_scale), ImGuiCond_FirstUseEver);
@@ -1671,7 +1668,6 @@ void GPU::DrawDebugStateWindow()
   }
 
   ImGui::End();
-#endif
 }
 
 void GPU::DrawRendererStats(bool is_idle_frame) {}