only 400, 800, 1200 image resolutions remained

app/Models/Ecommerce/Channel/Channel.php

@@ -109,29 +109,14 @@ class Channel extends Model implements HasMedia, Sortable
      */
     public function registerMediaConversions(?Media $media = null): void
     {
-        $this->addMediaConversion('thumb150x150')
-            ->fit(Manipulations::FIT_CONTAIN, 150, 150);
-
-        $this->addMediaConversion('thumb200x200')
-            ->fit(Manipulations::FIT_CONTAIN, 200, 200);
-
         $this->addMediaConversion('thumb400x400')
             ->fit(Manipulations::FIT_CONTAIN, 400, 400);
-
-        $this->addMediaConversion('thumb720x720')
-            ->fit(Manipulations::FIT_CONTAIN, 720, 720);
-
+        
         $this->addMediaConversion('thumb800x800')
             ->fit(Manipulations::FIT_CONTAIN, 800, 800);
 
         $this->addMediaConversion('thumb1200x1200')
             ->fit(Manipulations::FIT_CONTAIN, 1200, 1200);
-
-        $this->addMediaConversion('thumb288x431')
-            ->fit(Manipulations::FIT_CONTAIN, 288, 431);
-
-        $this->addMediaConversion('thumb270x350')
-            ->fit(Manipulations::FIT_CONTAIN, 270, 350);
     }
 
     /**