Restore imconfig.h to original imgui state.

imconfig.h

@@ -23,9 +23,7 @@
 // Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
 // DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
 // for each static/DLL boundary you are calling from. Read "Context and Memory Allocators" section of imgui.cpp for more details.
-#ifdef WIN32_
-    #define IMGUI_API __declspec( dllexport )
-#endif
+//#define IMGUI_API __declspec( dllexport )
 //#define IMGUI_API __declspec( dllimport )
 
 //---- Don't define obsolete functions/enums/behaviors. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
@@ -93,7 +91,7 @@
         operator MyVec4() const { return MyVec4(x,y,z,w); }
 */
 //---- ...Or use Dear ImGui's own very basic math operators.
-#define IMGUI_DEFINE_MATH_OPERATORS
+//#define IMGUI_DEFINE_MATH_OPERATORS
 
 //---- Use 32-bit vertex indices (default is 16-bit) is one way to allow large meshes with more than 64K vertices.
 // Your renderer backend will need to support it (most example renderer backends support both 16/32-bit indices).