Remove client-side-experiments-config.json from this repo (#37304)

.vscode/settings.json

@@ -40,12 +40,6 @@
       "fileMatch": ["build-system/global-configs/caches.json"],
       "url": "./build-system/json-schemas/caches.json"
     },
-    {
-      "fileMatch": [
-        "build-system/global-configs/client-side-experiments-config.json"
-      ],
-      "url": "./build-system/json-schemas/client-side-experiments-config.json"
-    },
     {
       "fileMatch": ["build-system/tasks/bundle-size/filesize.json"],
       "url": "./build-system/json-schemas/filesize.json"

build-system/global-configs/OWNERS

@@ -11,10 +11,6 @@
         },
       ],
     },
-    {
-      pattern: 'client-side-experiments-config.json',
-      owners: [{name: 'danielrozenberg'}, {name: 'jridgewell'}],
-    },
     {
       pattern: '*-config.json',
       owners: [{name: 'alanorozco', requestReviews: false}],

build-system/global-configs/README.md

@@ -83,32 +83,6 @@ amp release --flavor="custom-prod"
 -   Flag `--version_override` is not supported.
 -   `AMP_CONFIG` can be customized with [`custom-config.json`](#custom-configjson) to further tailor the build.
 
-# client-side-experiments-config.json
+# Looking for client-side-experiments-config.json?
 
-This config is used to run client side diverted experiments, adding runtime support for deploying AMP experiment configuration updates faster via the CDN and cache pages. It is complimentary to `{canary,prod,custom}-config.json` and takes precedence over them. (See I2I issue: [#34013](https://github.com/ampproject/amphtml/issues/34013))
-
-The JSON object must contain exactly one field `experiments` which is an array of experiment definition objects with the following fields:
-
--   `name`: experiment name
--   `percentage`: percentage of AMP page views that will activate this experiment (between 0 and 1)
--   `rtvPrefix`: (optional) array of RTV prefixes that will cause this experiment to be active, with period (`.`) acting as a wildcard. e.g., `["00", "0.2106"]` will cause this experiment to activate on the Experimental channel, and on every channel for the month of June, 2021 (see [Versioning section in amp-framework-hosting.md](../../docs/spec/amp-framework-hosting.md#versioning) for an explanation of AMP versions and RTV numbers).
-
-Example:
-
-```json
-{
-  "experiments": [
-    {
-      "name": "chunked-amp",
-      "percentage": 0.5,
-    },
-    {
-      "name": "version-locking",
-      "percentage": 1,
-      "rtvPrefix": ["01", "02", "03", "04", "05"]
-    }
-  ]
-}
-```
-
-Once merged onto the `main` branch, this file is automatically picked up by the AMP CDN (usually within 1-2 hours from PR merge) and its content is injected into `v0.[m]js`. AMP caches can also inject the contents of this file verbatim into pages inside a `<script language=text/json id=__AMP_EXP>{...}</script>` element.
+This file now resides in the [ampproject/cdn-configuration](https://github.com/ampproject/cdn-configuration/blob/main/configs/client-side-experiments.json) repository.