Removed cursor centering XFlush hack.

src/x11_window.c

@@ -1106,24 +1106,12 @@ void _glfwPlatformPollEvents(void)
         processEvent(&event);
     }
 
-    // Check whether the cursor has moved inside an focused window that has
-    // captured the cursor (because then it needs to be re-centered)
-
-    _GLFWwindow* window;
-    window = _glfw.focusedWindow;
-    if (window)
+    _GLFWwindow* window = _glfw.focusedWindow;
+    if (window && window->cursorMode == GLFW_CURSOR_DISABLED)
     {
-        if (window->cursorMode == GLFW_CURSOR_DISABLED)
-        {
-            int width, height;
-            _glfwPlatformGetWindowSize(window, &width, &height);
-            _glfwPlatformSetCursorPos(window, width / 2, height / 2);
-
-            // NOTE: This is a temporary fix.  It works as long as you use
-            //       offsets accumulated over the course of a frame, instead of
-            //       performing the necessary actions per callback call.
-            XFlush(_glfw.x11.display);
-        }
+        int width, height;
+        _glfwPlatformGetWindowSize(window, &width, &height);
+        _glfwPlatformSetCursorPos(window, width / 2, height / 2);
     }
 }