merhaba arkadaşlar file inputla içerik yükledikten sonra x işaretine basınca silip kaydetmek istiyorum sadece silme işlemi çalışmıyor nasıl yapabilirim?

iv class="row mb-6">
                                                    <!--begin::Label-->
                                                    <label class="col-lg-4 col-form-label fw-bold fs-6">Site Favicon</label>
                                                    <!--end::Label-->
                                                    <!--begin::Col-->
                                                    <div class="col-lg-8">
                                                        <!--begin::Image input-->
                                                        <div class="image-input image-input-outline" data-kt-image-input="true" style="background-image: url(assets/media/avatars/blank.png)">
                                                            <!--begin::Preview existing avatar-->
                                                            <div class="image-input-wrapper w-55px h-55px" style="background-image: url(../<?php echo $ayarcek['ayar_favicon']; ?>)"></div>
                                                            <!--end::Preview existing avatar-->
                                                            <!--begin::Label-->
                                                            <label class="btn btn-icon btn-circle btn-active-color-primary w-25px h-25px bg-body shadow" data-kt-image-input-action="change" data-bs-toggle="tooltip" title="Change avatar">
                                                                <i class="bi bi-pencil-fill fs-7"></i>
                                                                <!--begin::Inputs-->
                                                                <input type="file" name="ayar_favicon" accept=".png, .jpg, .jpeg" />
                                                                <input type="hidden" name="avatar_remove" />
                                                                <!--end::Inputs-->
                                                            </label>
                                                            
                                                            <!--end::Label-->
                                                            <!--begin::Cancel-->
                                                            <span class="btn btn-icon btn-circle btn-active-color-primary w-25px h-25px bg-body shadow" data-kt-image-input-action="cancel" data-bs-toggle="tooltip" title="Cancel avatar">
                                                                <i class="bi bi-x fs-2"></i>
                                                            </span>
                                                            <!--end::Cancel-->
                                                            <!--begin::Remove-->
                                                            <span class="btn btn-icon btn-circle btn-active-color-primary w-25px h-25px bg-body shadow" data-kt-image-input-action="remove" data-bs-toggle="tooltip" title="Remove avatar">
                                                                <i class="bi bi-x fs-2"></i>
                                                            </span>
                                                            <!--end::Remove-->
                                                        </div>
                                                        <!--end::Image input-->
                                                        <!--begin::Hint-->
                                                        <div class="form-text">İzin verilen dosya: png, jpg, jpeg.</div>
                                                        <!--end::Hint-->
                                                    </div>
                                                    
                                                    <!--end::Col-->
                                                </div>

if ($_FILES['ayar_favicon']['size']>3145728) {
        
        echo "Bu dosya boyutu çok büyük";
$_SESSION['genelayar']="no";
        Header("Location:../genel-ayar.php");
            exit;

    }


    $izinli_uzantilar=array('jpg','png','gif','','ico');

    //echo $_FILES['ayar_logo']["name"];

    $ext=strtolower(substr($_FILES['ayar_favicon']["name"],strpos($_FILES['ayar_favicon']["name"],'.')+1));

    if (in_array($ext, $izinli_uzantilar) === false) {
        echo "Bu uzantı kabul edilmiyor";
        $_SESSION['genelayar']="no";
        Header("Location:../genel-ayar.php");

        exit;
    }

  

  $uploads_dir = '../../../dimg';

  @$tmp_name = $_FILES['ayar_favicon']["tmp_name"];
  @$name = $_FILES['ayar_favicon']["name"];

  $benzersizsayi4=rand(20000,32000);
  $refimgyol=substr($uploads_dir, 6)."/".$benzersizsayi4.$name;
    $bos = "0";
  @move_uploaded_file($tmp_name, "$uploads_dir/$benzersizsayi4$name");

    if(!$name){
        
        $duzenle=$db->prepare("INSERT ayar SET
    ayar_favicon=:favicon
    WHERE ayar_id=0");
  $update=$duzenle->execute(array(
    'favicon' => $bos
    ));
        $_SESSION["genelayar"] = true;
     Header("Location:../genel-ayar.php");
        
    }else{
  
  $duzenle=$db->prepare("UPDATE ayar SET
    ayar_favicon=:favicon
    WHERE ayar_id=0");
  $update=$duzenle->execute(array(
    'favicon' => $refimgyol
    ));



  if ($update) {

    $resimsilunlink=$_POST['eski_yol'];
    unlink("../../$resimsilunlink");
    $_SESSION["genelayar"] = true;
    Header("Location:../genel-ayar.php");

  } else {
$_SESSION['genelayar']="no";
    Header("Location:../genel-ayar.php");
  }

}