Remove unused include/plain.css.

include/plain.css

-#VNC_controls {
-    overflow: hidden;
-}
-#VNC_controls ul {
-    list-style: none;
-    margin: 0px;
-    padding: 0px;
-}
-#VNC_controls li {
-    float: left;
-    margin-right: 15px;
-}
-
-#VNC_host {
-    width: 100px;
-}
-#VNC_port {
-    width: 50px;
-}
-#VNC_password {
-    width: 80px;
-}
-#VNC_encrypt {
-}
-#VNC_connectTimeout {
-    width: 30px;
-}
-#VNC_connect_button {
-    width: 110px;
-}
-
-#VNC_status_bar td {
-    margin-top: 15px;
-    padding: 0px;
-    margin: 0px;
-}
-#VNC_status_bar div {
-    font-size: 12px;
-    margin: 0px;
-    padding: 0px;
-}
-.VNC_status_button {
-    font-size: 10px;
-    margin: 0px;
-    padding: 0px;
-}
-#VNC_status {
-    text-align: center;
-}
-#VNC_settings_menu {
-    display: none;
-    position: absolute;
-    width: 12em;
-    border: 1px solid #888;
-    background-color: #f0f2f6;
-    padding: 5px; margin: 3px;
-    z-index: 100; opacity: 1;
-    text-align: left; white-space: normal;
-}
-#VNC_settings_menu ul {
-    list-style: none;
-    margin: 0px;
-    padding: 0px;
-}
-
-.VNC_buttons_right {
-    text-align: right;
-}
-.VNC_buttons_left {
-    text-align: left;
-}
-.VNC_status_normal {
-    background: #eee;
-}
-.VNC_status_error {
-    background: #f44;
-}
-.VNC_status_warn {
-    background: #ff4;
-}
-
-/* Do not set width/height for VNC_screen or VNC_canvas or incorrect
- * scaling will occur. Canvas resizes to remote VNC settings */
-#VNC_screen {
-    text-align: center;
-    display: table;
-}
-#VNC_canvas {
-    background: #eee;
-}
-
-#VNC_clipboard_clear_button {
-}
-#VNC_clipboard_text {
-    font-size: 9px;
-}
-