.github: fix model and feature request yml (#3155)

.github/ISSUE_TEMPLATE/10_model_request.yml

@@ -1,6 +1,5 @@
 name: Model request
 description: Request a new model for the library
-title: ""
 labels: [mr]
 body:
   - type: markdown

.github/ISSUE_TEMPLATE/20_feature_request.yml

@@ -1,6 +1,5 @@
 name: Feature request
 description: Propose a new feature
-title: ""
 labels: [needs-triage, fr]
 body:
   - type: markdown