#317: Remove mentions of https://yt.lemnoslife.com

Verified exhaustiveness thanks to:

```bash
grep -r 'yt.lemnoslife.com'
```

CITATION.cff

@@ -9,7 +9,6 @@ authors:
   - given-names: Benjamin
     family-names: Loison
 repository-code: 'https://github.com/Benjamin-Loison/YouTube-operational-API'
-url: 'https://yt.lemnoslife.com'
 abstract: >-
   YouTube operational API works when YouTube Data API v3
   fails.

CONTRIBUTING.md

@@ -9,45 +9,6 @@ Thank you for investing your time in contributing to YouTube operational API!
 
 ## Contributing as a user
 
-### Empower the no-key service
-
-- [If you don't have a YouTube Data API v3 key](#if-you-dont-have-a-youtube-data-api-v3-key)
-- [If you already have a YouTube Data API v3 key](#if-you-already-have-an-youtube-data-api-v3-key)
-
-#### If you don't have a YouTube Data API v3 key
-
-The following procedure requires you to have a Google account, don't hesitate to create an ad hoc account.
-
-Go to: https://console.cloud.google.com/projectcreate
-
-Click on the `CREATE` button.
-
-Go to: https://console.cloud.google.com/marketplace/product/google/youtube.googleapis.com
-
-Click on the `ENABLE` button.
-
-Click on the `CREATE CREDENTIALS` button.
-
-Choose the `Public data` option.
-
-Click on the `NEXT` button.
-
-Copy the displayed `API Key`.
-
-#### If you already have an YouTube Data API v3 key
-
-Note that sharing your YouTube Data API v3 key means that you can't rely on its quota for your personal usage of it.
-
-Go to: https://yt.lemnoslife.com
-
-Paste your API key to the field next to `Share your YouTube Data API v3 key to power the no-key service:` and click on the `share` button.
-
-If the message `YouTube Data API v3 key added.` is displayed, it means that your contribution got confirmed, thank you!
-
-Don't hesitate to repeat this procedure with as many Google accounts as you can (don't hesitate to create ad hoc accounts).
-
-### More broadly
-
 If you encounter any problem or have any suggestion, don't hesitate to [open an issue](https://github.com/Benjamin-Loison/YouTube-operational-API/issues) if your problem isn't already listed. Don't hesitate to [reach out the YouTube operational API community](https://github.com/Benjamin-Loison/YouTube-operational-API/#contact).
 
 ## Contributing as a developer

tools/checkOperationnalAPI.py

@@ -8,7 +8,7 @@
 
 def getVideos(pageToken = '', callsIndex = 0):
     global videoIds
-    url = f'https://yt.lemnoslife.com/search?part=id&q={query}&type=video'
+    url = f'http://localhost/search?part=id&q={query}&type=video'
     if pageToken != '':
         url += '&pageToken=' + pageToken
     data = requests.get(url).json()