chore(*): remove config.yml in favor of centralized template (#312)

This pull request removes the configuration for GitHub issue templates,
effectively disabling blank issues and removing the contact links
section. This change simplifies the repository's issue submission
process by eliminating predefined guidance and resources.

Key changes:

### Removal of GitHub issue template configuration:
*
[`.github/ISSUE_TEMPLATE/config.yml`](diffhunk://#diff-1c0d972ee49103af56fd608a77a28e1eb12f6908f263f0f183d46868fdcd8ea2L1-L11):
Disabled blank issues by setting `blank_issues_enabled` to `false` and
removed the `contact_links` section, which previously included links to
contributing guides, textlint guides, and the AST tree for textlint.

Author: lumirlumir