docs: remove stale reference to plugins page (#5414)

BUNDLE-README.md

@@ -83,14 +83,12 @@ inline into the page. This, and many more configuration options can be found
 here: <https://uppy.io/docs/dashboard/>.
 
 Uppy has many more Plugins besides Xhr and the Dashboard. For example, you can
-enable Webcam, Instagram, or video encoding support. For a full list of Plugins
-check here: <https://uppy.io/docs/plugins/>.
-
-Note that for some Plugins, you will need to run a server side component called:
-Companion. Those plugins are marked with a (c) symbol. Alternatively, you can
-sign up for a free Transloadit account. Transloadit runs Companion for you, tusd
-servers to handle resumable file uploads, and can post-process files to scan for
-viruses, recognize faces, etc. Check: <https://transloadit.com>.
+enable Webcam, Instagram, or video encoding support. Note that for some Plugins,
+you will need to run a server side component called: Companion. Those plugins
+are marked with a (c) symbol. Alternatively, you can sign up for a free
+Transloadit account. Transloadit runs Companion for you, tusd servers to handle
+resumable file uploads, and can post-process files to scan for viruses,
+recognize faces, etc. Check: <https://transloadit.com>.
 
 ## Getting help
 

README.md

@@ -124,8 +124,6 @@ object.
 ## Documentation
 
 - [Uppy](https://uppy.io/docs/uppy/) — full list of options, methods and events
-- [Plugins](https://uppy.io/docs/plugins/) — list of Uppy plugins and their
-  options
 - [Companion](https://uppy.io/docs/companion/) — setting up and running a
   Companion instance, which adds support for Instagram, Dropbox, Box, Google
   Drive and remote URLs
@@ -136,8 +134,6 @@ object.
 
 ## Plugins
 
-[List of plugins and their common options](https://uppy.io/docs/plugins/)
-
 ### UI Elements
 
 - [`Dashboard`](https://uppy.io/docs/dashboard/) — universal UI with previews,

packages/@uppy/core/src/Uppy.ts

@@ -1799,7 +1799,7 @@ export class Uppy<
       const msg =
         `Already found a plugin named '${existsPluginAlready.id}'. ` +
         `Tried to use: '${pluginId}'.\n` +
-        'Uppy plugins must have unique `id` options. See https://uppy.io/docs/plugins/#id.'
+        'Uppy plugins must have unique `id` options.'
       throw new Error(msg)
     }
 

packages/@uppy/core/src/__snapshots__/Uppy.test.ts.snap

@@ -8,7 +8,7 @@ exports[`src/Core > plugins > should not be able to add an invalid plugin 1`] =
 
 exports[`src/Core > plugins > should prevent the same plugin from being added more than once 1`] = `
 [Error: Already found a plugin named 'TestSelector1'. Tried to use: 'TestSelector1'.
-Uppy plugins must have unique \`id\` options. See https://uppy.io/docs/plugins/#id.]
+Uppy plugins must have unique \`id\` options.]
 `;
 
 exports[`src/Core > uploading a file > should only upload files that are not already assigned to another upload id 1`] = `