[Editorial] Move spec files to root directory and remove unused files

.github/workflows/generate.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           GH_PAGES_BRANCH: gh-pages
           TOOLCHAIN: bikeshed
-          SOURCE: docs/index.bs
-          DESTINATION: docs/index.html
+          SOURCE: index.bs
+          DESTINATION: index.html
           VALIDATE_MARKUP: true
           BUILD_FAIL_ON: fatal

.pr-preview.json

@@ -1,5 +1,5 @@
 {
-  "src_file": "docs/index.bs",
+  "src_file": "index.bs",
   "type": "bikeshed",
   "params": {
     "force": 1

README.md

@@ -16,7 +16,7 @@ Spec development happens via [issues in this repository](https://github.com/w3c/
 
 Updates to the spec must reference [resolved issues marked `needs spec`](https://github.com/w3c/ServiceWorker/issues?q=is%3Aclosed+label%3A%22needs+spec%22).
 
-To make edits to the design, please send pull requests against the Nightly spec on the master branch. We use [bikeshed](https://github.com/tabatkins/bikeshed). So, change `docs/index.bs` and submit it with the corresponding bikesheded `index.html`.
+To make edits to the design, please send pull requests against the Nightly spec on the master branch. We use [bikeshed](https://github.com/tabatkins/bikeshed). So, change `index.bs` and submit it with the corresponding bikesheded `index.html`.
 
 ## Examples
 

docs/index.bs → index.bs

@@ -4263,4 +4263,4 @@ spec: storage; urlPrefix: https://storage.spec.whatwg.org/
   The authors would also like to thank Dimitri Glazkov for his scripts and formatting tools which have been essential in the production of this specification. The authors are also grateful for his considerable guidance.
 
   Thanks also to Vivian Cromwell, Greg Simon, Alex Komoroske, Wonsuk Lee, and Seojin Kim for their considerable professional support.
-</section>
+</section>