Remove unused styles from stylesheet

JDK-8267709 indicated the likelihood of some unused styles in the stylesheet. These should be verified as unused and removed.

        removeAll(styleSheetNames, "all-classes-container", "all-packages-container",
                "bottom-nav", "clear", "constant-values-container", "deprecated-content",
                "footer", "hidden", "override-specify-label", "serialized-class-details",
                "tab", "table-sub-heading-color");