fix: removed unused theme module

src/theme/Navbar/Layout/index.js

-import React from 'react';
-import clsx from 'clsx';
-import {useThemeConfig} from '@docusaurus/theme-common';
-import {
-  useHideableNavbar,
-  useNavbarMobileSidebar,
-} from '@docusaurus/theme-common/internal';
-import NavbarMobileSidebar from '@theme/Navbar/MobileSidebar';
-
-
-
-
-function NavbarBackdrop(props) {
-  return (
-    <div
-      role="presentation"
-      {...props}
-      className={clsx('navbar-sidebar__backdrop', props.className)}
-    />
-  );
-}
-export default function NavbarLayout({children}) {
-
-  const {
-    navbar: {hideOnScroll, style},
-  } = useThemeConfig();
-  const mobileSidebar = useNavbarMobileSidebar();
-  const {navbarRef, isNavbarVisible} = useHideableNavbar(hideOnScroll);
-  return (
-    <nav
-      ref={navbarRef}
-      className={clsx(
-        'navbar',
-        'navbar--fixed-top',
-        hideOnScroll && [
-          styles.navbarHideable,
-          !isNavbarVisible && styles.navbarHidden,
-        ],
-        {
-          'navbar--dark': style === 'dark',
-          'navbar--primary': style === 'primary',
-          'navbar-sidebar--show': mobileSidebar.shown,
-        },
-      )}>
-      {children}
-      <NavbarBackdrop onClick={mobileSidebar.toggle} />
-      <NavbarMobileSidebar />
-    </nav>
-  );
-}