apply the school year concept

app/Views/admin/certificates/index.php

@@ -61,22 +61,6 @@ $decisionBadge = [
     <i class="bi bi-award me-2"></i>Generate Certificates
 </h2>
 
-<!-- School year filter -->
-<div class="d-flex justify-content-end mb-3">
-    <form method="get" action="<?= site_url('administrator/certificates') ?>" class="d-flex gap-2 align-items-center">
-        <label class="form-label mb-0 me-1 text-muted small">School Year</label>
-        <input type="text"
-               name="school_year"
-               class="form-control form-control-sm"
-               style="width:130px;"
-               value="<?= esc($schoolYear) ?>"
-               placeholder="e.g. 2024-2025">
-        <button type="submit" class="btn btn-sm btn-outline-primary">
-            <i class="bi bi-arrow-repeat me-1"></i>Reload
-        </button>
-    </form>
-</div>
-
 <?php if (session()->getFlashdata('error')): ?>
     <div class="alert alert-danger alert-dismissible fade show" role="alert">
         <?= esc(session()->getFlashdata('error')) ?>