get rid of old options pages

chrome/browser/resources/options/chromeos/system_options_page.css

-.pointer-sensitivity-more {
-  float: right;
-}
-
-html[dir=rtl] .pointer-sensitivity-more {
-  float: left;
-}
-
-.option-name {
-   display: inline;
-}
-
-#timezone-value {
-   display: inline-block;
-   vertical-align: baseline;
-}
-
-#pointer-value,
-#slider-control {
-   display: inline-block;
-   vertical-align: top;
-}
-
-#bluetooth-options-div {
-  -webkit-box-orient: vertical;
-  display: -webkit-box;
-}