WebUI: remove unused paper-tabs-style

Bug: 960564
Change-Id: I5a5e083a9fa3ff43dcf252ea7faaa508dfd8bd36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1618053Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661104}

ui/webui/resources/cr_elements/paper_tabs_style_css.html

-<link rel="import" href="../html/polymer.html">
-
-<link rel="import" href="shared_vars_css.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/color.html">
-
-<!-- Common paper-tabs styling for Material Design WebUI. -->
-<dom-module id="paper-tabs-style">
-  <template>
-    <style>
-      paper-tabs {
-        --paper-tabs-selection-bar-color: var(--google-blue-600);
-      }
-
-      :host-context([dark]) paper-tabs {
-        /* TODO(dbeam): verify these colors with Namrata. */
-        --paper-tabs-selection-bar-color: var(--google-blue-refresh-300);
-      }
-
-      paper-tab {
-        --paper-tab-content: {
-          color: var(--google-blue-600);
-        };
-        --paper-tab-content-unselected: {
-          color: var(--cr-secondary-text-color);
-        };
-      }
-
-      :host-context([dark]) paper-tab {
-        --paper-tab-content: {
-          color: var(--google-blue-refresh-300);
-        };
-      }
-    </style>
-  </template>
-</dom-module>

ui/webui/resources/cr_elements_resources.grdp

@@ -376,10 +376,6 @@
              file="cr_elements/paper_button_style_css.html"
              type="chrome_html"
              compress="gzip" />
-  <structure name="IDR_CR_ELEMENTS_PAPER_TABS_STYLE_CSS_HTML"
-             file="cr_elements/paper_tabs_style_css.html"
-             type="chrome_html"
-             compress="gzip" />
   <structure name="IDR_CR_ELEMENTS_SEARCH_HIGHLIGHT_STYLE_CSS_HTML"
              file="cr_elements/search_highlight_style_css.html"
              type="chrome_html"