Remove useTheme util

doc/theming/styled/utils/UseThemeDoc.vue

@@ -1,27 +0,0 @@
-<template>
-    <DocSectionText v-bind="$attrs">
-        <p>Replaces the theme including the base and the preset such as from PrimeOne to Material. Note that the built-in Material theme is under development.</p>
-    </DocSectionText>
-    <DocSectionCode :code="code" hideToggleCode importCode hideStackBlitz />
-</template>
-
-<script>
-export default {
-    data() {
-        return {
-            code: {
-                basic: `
-import { useTheme } from 'primevue/themes'; 
-
-const changeTheme() {
-    useTheme({
-        base: MaterialDesign,
-        preset: M3
-    });
-}
-`
-            }
-        };
-    }
-};
-</script>

pages/theming/styled/index.vue

@@ -47,7 +47,6 @@ import UpdatePresetDoc from '@/doc/theming/styled/utils/UpdatePresetDoc.vue';
 import UpdatePrimaryPaletteDoc from '@/doc/theming/styled/utils/UpdatePrimaryPaletteDoc.vue';
 import UpdateSurfacePaletteDoc from '@/doc/theming/styled/utils/UpdateSurfacePaletteDoc.vue';
 import UsePresetDoc from '@/doc/theming/styled/utils/UsePresetDoc.vue';
-import UseThemeDoc from '@/doc/theming/styled/utils/UseThemeDoc.vue';
 
 export default {
     data() {
@@ -164,11 +163,6 @@ export default {
                             label: 'updateSurfacePalette',
                             component: UpdateSurfacePaletteDoc
                         },
-                        {
-                            id: 'usetheme',
-                            label: 'useTheme',
-                            component: UseThemeDoc
-                        },
                         {
                             id: 'dt',
                             label: '$dt',