Add logic to prevent the current user from removing himself from the administrator list, and a flash error notice for that scenario

app/controllers/admin/administrators_controller.rb

@@ -26,7 +26,12 @@ class Admin::AdministratorsController < Admin::BaseController
   end
 
   def destroy
-    @administrator.destroy
+    if current_user.id == @administrator.user_id
+      flash[:error] = I18n.t("admin.administrators.administrator.restricted_removal")
+    else
+      @administrator.destroy
+    end
+
     redirect_to admin_administrators_path
   end
 end

config/locales/admin.en.yml

@@ -233,6 +233,7 @@ en:
       administrator:
         add: Add
         delete: Delete
+        restricted_removal: "Sorry, you can't remove yourself from the administrators"
       search:
         email_placeholder: Search user by email
         search: Search

config/locales/admin.es.yml

@@ -187,6 +187,7 @@ es:
       administrator:
         add: Añadir como Administrador
         delete: Borrar
+        restricted_removal: "Lo sentimos, no puedes te eliminar a ti mismo de la lista"
       search:
         email_placeholder: Buscar usuario por email
         search: Buscar