Make the "Fix: can not create gl context with GLFW3 + ANGLE" apply to Windows & EGL only

src/Magnum/Platform/GlfwApplication.cpp

@@ -451,8 +451,10 @@ bool GlfwApplication::tryCreate(const Configuration& configuration, const GLConf
         }
         #else
         glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
+        #if defined(CORRADE_TARGET_WINDOWS) && !defined(MAGNUM_TARGET_DESKTOP_GLES)
         glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
         #endif
+        #endif
 
     /* Request usable version otherwise */
     } else {
@@ -476,8 +478,10 @@ bool GlfwApplication::tryCreate(const Configuration& configuration, const GLConf
         #endif
         glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
         glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
+        #if defined(CORRADE_TARGET_WINDOWS) && !defined(MAGNUM_TARGET_DESKTOP_GLES)
         glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
         #endif
+        #endif
     }
 
     /* Create window. Hide it by default so we don't have distracting window