fix(linkwarden): remove broken npx playwright install commands

Linkwarden's apps/web/package.json has a postinstall hook that runs
'playwright install --with-deps chromium' automatically during yarn
install. The explicit 'npx playwright install-deps' and
'npx playwright install' are redundant and break under Yarn 4 PnP,
where npx gets intercepted by Yarn's command resolution resulting in:
  Usage Error: Couldn't find a script named 'playwright'.

Fixes #12586

ct/linkwarden.sh

@@ -57,8 +57,6 @@ function update_script() {
       $STD corepack prepare "yarn@${yarn_ver}" --activate || true
     fi
     $STD yarn
-    $STD npx playwright install-deps
-    $STD npx playwright install
     mv /opt/.env /opt/linkwarden/.env
     $STD yarn prisma:generate
     $STD yarn web:build

install/linkwarden-install.sh

@@ -48,8 +48,6 @@ if command -v corepack >/dev/null 2>&1; then
   $STD corepack prepare "yarn@${yarn_ver}" --activate || true
 fi
 $STD yarn
-$STD npx playwright install-deps
-$STD npx playwright install
 cat <<EOF >/opt/linkwarden/.env
 NEXTAUTH_SECRET=${SECRET_KEY}
 NEXTAUTH_URL=http://${LOCAL_IP}:3000