chore: remove feature request issue template

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,47 +0,0 @@
-name: Feature request
-description: Suggest a new feature or improvement
-title: "[feature] "
-labels: ["enhancement"]
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Thanks for the suggestion! Please check that:
-        - Your idea is **in scope** for this repo (the Python wrapper, sampler, CLI, packaging).
-        - Changes to the patched Firefox C++ source belong at [feder-cr/firefox-stealth](https://github.com/feder-cr/firefox-stealth) instead.
-        - You have searched [existing issues](https://github.com/feder-cr/invisible_playwright/issues?q=is%3Aissue) for similar requests.
-  - type: textarea
-    id: problem
-    attributes:
-      label: Problem
-      description: What problem does this solve? What can't you currently do, or what is awkward today?
-    validations:
-      required: true
-  - type: textarea
-    id: proposal
-    attributes:
-      label: Proposed solution
-      description: How would the feature work? API sketches, CLI examples, or pseudocode welcome.
-    validations:
-      required: true
-  - type: textarea
-    id: alternatives
-    attributes:
-      label: Alternatives considered
-      description: Other approaches you thought about and why they fall short.
-    validations:
-      required: false
-  - type: textarea
-    id: context
-    attributes:
-      label: Additional context
-      description: Links to related issues, prior art in other libraries, screenshots, etc.
-    validations:
-      required: false
-  - type: checkboxes
-    id: contribute
-    attributes:
-      label: Are you willing to contribute?
-      options:
-        - label: I'd be willing to open a PR for this if accepted.
-          required: false