[chore] Update some git template stuff (#4595)

Removes some github stuff we don't need anymore, makes "no ai" thingy part of docs PRs as well.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4595
Co-authored-by: tobi <tobi.smethurst@protonmail.com>
Co-committed-by: tobi <tobi.smethurst@protonmail.com>

.gitea/pull_request_template.md

@@ -13,11 +13,11 @@ closes #(another issue)
 
 Please put an x inside each checkbox to indicate that you've read and followed it: `[ ]` -> `[x]`
 
-If this is a documentation change, only the first checkbox must be filled (you can delete the others if you want).
+If this is a documentation change, only the first two checkboxes must be filled (you can delete the others if you want).
 
 - [ ] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md).
+- [ ] I/we have not used so-called 'AI' to create the proposed changes.
 - [ ] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat.
-- [ ] I/we have not leveraged AI to create the proposed changes.
 - [ ] I/we have performed a self-review of added code.
 - [ ] I/we have written code that is legible and maintainable by others.
 - [ ] I/we have commented the added code, particularly in hard-to-understand areas.

.github/README.md

@@ -1,5 +0,0 @@
-# GoToSocial
-
-This is a mirror. You can find us on https://codeberg.org/superseriousbusiness/gotosocial.
-
-We will **stop mirroring** to Github after 0.20 is released. This will likely be sometime **in August**.

.github/workflows/autoclose.yaml

@@ -1,30 +0,0 @@
-on:
-  issues:
-    types: [opened]
-  pull_request_target:
-    types: [opened]
-
-permissions:
-  issues: write
-  pull-requests: write
-
-jobs:
-  autoclose:
-    runs-on: ubuntu-latest
-    steps:
-      - name: issue
-        if: ${{ github.event.issue.id != '' }}
-        run: |
-          gh issue close $ISSUE --comment "This repository is a mirror. Please open issues on https://codeberg.org/superseriousbusiness/gotosocial." --reason "not planned"
-          gh issue lock $ISSUE
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          ISSUE: ${{ github.event.issue.html_url }}
-      - name: pr
-        if: ${{ github.event.pull_request.id != '' }}
-        run: |
-          gh pr close $PULL_REQUEST --comment "This repository is a mirror. Please open PRs on https://codeberg.org/superseriousbusiness/gotosocial."
-          gh pr lock $PULL_REQUEST
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          PULL_REQUEST: ${{ github.event.pull_request.html_url }}