Remove project idea submission button

.github/ISSUE_TEMPLATE/05-project-contribution.yml

@@ -1,35 +0,0 @@
-name: "🙏 ​ ​Submit a Project Idea"
-description: Help us add project ideas to roadmaps.
-labels: [project contribution]
-assignees: []
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Thanks for taking the time to submit a project idea! Please fill out the information below and we'll get back to you as soon as we can.
-  - type: input
-    id: roadmap-title
-    attributes:
-      label: What Roadmap is this project for?
-      placeholder: e.g. Backend Roadmap
-    validations:
-      required: true
-  - type: dropdown
-    id: project-difficulty
-    attributes:
-      label: Project Difficulty
-      options:
-        - Beginner
-        - Intermediate
-        - Advanced
-    validations:
-      required: true
-  - type: textarea
-    id: roadmap-description
-    attributes:
-      label: Add Project Details
-      description: Please write a detailed description of the project in 3rd person e.g. "You are required to build a..."
-      placeholder: |
-          e.g. You are required to build a RESTful API...
-    validations:
-      required: true