Revert "feat(variants): implement restoration of previously suspended variants with usable dates"

This reverts commit 3a4f6b64d2.

app/Domains/FiestaFutbolInfantil/Resources/EntryResource.php

@@ -12,12 +12,7 @@ class EntryResource extends JsonResource
     /** @return array<string, mixed> */
     public function toArray(Request $request): array
     {
-        $variant = $this->variants
-            ->filter(fn ($candidate): bool => $candidate->sales_disabled_at === null
-                && $candidate->replaced_by_variant_id === null)
-            ->sortByDesc('id')
-            ->first()
-            ?? $this->variants->sortByDesc('id')->firstOrFail();
+        $variant = $this->variants->sole();
 
         return [
             'id' => $this->id,