impr: Remove duplicate window name from macOS title bar

lib/libimhex/include/hex/helpers/utils_macos.hpp

@@ -2,6 +2,8 @@
 
 #if defined(OS_MACOS)
 
+    struct GLFWwindow;
+
     extern "C" {
 
         void errorMessageMacos(const char *message);
@@ -9,6 +11,8 @@
         bool isMacosSystemDarkModeEnabled();
         float getBackingScaleFactor();
 
+        void setupMacosWindowStyle(GLFWwindow *window);
+
     }
 
 #endif