Fixup proto header (#1104)

lerobot/scripts/server/hilserl.proto

@@ -1,5 +1,3 @@
-// !/usr/bin/env python
-
 //  Copyright 2024 The HuggingFace Inc. team.
 //  All rights reserved.
 
@@ -14,6 +12,7 @@
 //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
+
 syntax = "proto3";
 
 package hil_serl;