chore: remove mpa support

Author: userquin

src/index.ts

@@ -32,16 +32,14 @@ export function withPwa(config: UserConfig) {
 
   let api: VitePluginPWAAPI | undefined
 
-  const mpa = config.mpa === true
-
   vitePlugins.push(
     VitePWA({ ...pwaPluginOptions }),
     {
       name: 'vite-plugin-pwa:vitepress',
       apply: 'build',
       enforce: 'post',
       configResolved(resolvedViteconfig) {
-        if (!resolvedViteconfig.build.ssr || mpa)
+        if (!resolvedViteconfig.build.ssr)
           api = resolvedViteconfig.plugins.find(p => p.name === 'vite-plugin-pwa')?.api
       },
     },