doc: Remove good_first_issue.yml

.github/ISSUE_TEMPLATE/good_first_issue.yml

@@ -1,44 +0,0 @@
-name: Good First Issue
-description: (Regular devs only) Suggest a new good first issue
-labels: [good first issue]
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Please add the label "good first issue" manually before or after opening
-
-        A good first issue is an uncontroversial issue, that has a relatively unique and obvious solution
-
-        Motivate the issue and explain the solution briefly
-  - type: textarea
-    id: motivation
-    attributes:
-      label: Motivation
-      description: Motivate the issue
-    validations:
-      required: true
-  - type: textarea
-    id: solution
-    attributes:
-      label: Possible solution
-      description: Describe a possible solution
-    validations:
-      required: false
-  - type: textarea
-    id: useful-skills
-    attributes:
-      label: Useful Skills
-      description: For example, “`std::thread`”, “Qt6 GUI and async GUI design” or “basic understanding of Bitcoin mining and the Bitcoin Core RPC interface”.
-      value: |
-        * Compiling Bitcoin Core from source
-        * Running the C++ unit tests and the Python functional tests
-        * ...
-  - type: textarea
-    attributes:
-      label: Guidance for new contributors
-      description: Please leave this to automatically add the footer for new contributors
-      value: |
-        Want to work on this issue?
-
-        For guidance on contributing, please read [CONTRIBUTING.md](https://github.com/bitcoin/bitcoin/blob/master/CONTRIBUTING.md) before opening your pull request.
-