chore: Update deleteCustomAttribute method in SDK (#3334)

spec/controllers/api/v1/widget/contacts_controller_spec.rb

@@ -87,4 +87,25 @@ RSpec.describe '/api/v1/widget/contacts', type: :request do
       end
     end
   end
+
+  describe 'POST /api/v1/widget/destroy_custom_attributes' do
+    let(:params) { { website_token: web_widget.website_token, identifier: 'test', custom_attributes: ['test'] } }
+
+    context 'with invalid website token' do
+      it 'returns unauthorized' do
+        post '/api/v1/widget/destroy_custom_attributes', params: { website_token: '' }
+        expect(response).to have_http_status(:not_found)
+      end
+    end
+
+    context 'with correct website token' do
+      it 'calls destroy custom attributes' do
+        post '/api/v1/widget/destroy_custom_attributes',
+             params: params,
+             headers: { 'X-Auth-Token' => token },
+             as: :json
+        expect(contact.reload.custom_attributes).to eq({})
+      end
+    end
+  end
 end