style: remove padding in New Tab

(cherry picked from commit 4f892e0e60d75d7e0e9ab55245444fb1bed99395)

browser/extensions/newtab/content-src/components/Sections/Sections.jsx

@@ -262,7 +262,7 @@ export class Section extends React.PureComponent {
           isWebExtension={this.props.isWebExtension}
         >
           {!shouldShowEmptyState && (
-            <ul className="section-list" style={{ padding: 0 }}>
+            <ul className="section-list">
               {cards}
             </ul>
           )}

browser/extensions/newtab/data/content/activity-stream.bundle.js

@@ -10267,10 +10267,7 @@ class Section extends (external_React_default()).PureComponent {
       dispatch: this.props.dispatch,
       isWebExtension: this.props.isWebExtension
     }, !shouldShowEmptyState && /*#__PURE__*/external_React_default().createElement("ul", {
-      className: "section-list",
-      style: {
-        padding: 0
-      }
+      className: "section-list"
     }, cards), shouldShowEmptyState && /*#__PURE__*/external_React_default().createElement("div", {
       className: "section-empty-state"
     }, /*#__PURE__*/external_React_default().createElement("div", {