[Windows] Remove meta_mem update on keyup/keydown.

(cherry picked from commit e6067a39b523d4c153f78e76f506ee12f2bf046f)

platform/windows/display_server_windows.cpp

@@ -3418,9 +3418,6 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 					gr_mem = alt_mem;
 				}
 			}
-			if (wParam == VK_LWIN || wParam == VK_RWIN) {
-				meta_mem = (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN);
-			}
 
 			if (windows[window_id].ime_suppress_next_keyup && (uMsg == WM_KEYUP || uMsg == WM_SYSKEYUP)) {
 				windows[window_id].ime_suppress_next_keyup = false;