doc: Remove mentions of 'helpme' plugin

Plugin 'helpme' has been archived, the change removes all mentions of
it from documentation.

Changelog-None

Author: jirijakes

README.md

@@ -106,9 +106,6 @@ the lightning network.
 There are also numerous plugins available for Core Lightning which add
 capabilities: in particular there's a collection at: https://github.com/lightningd/plugins
 
-Including [helpme][helpme-github] which guides you through setting up
-your first channels and customizing your node.
-
 For a less reckless experience, you can encrypt the HD wallet seed:
  see [HD wallet encryption](#hd-wallet-encryption).
 

doc/beginners-guide/beginners-guide.md

@@ -57,6 +57,6 @@ Useful commands:
 
 Once you've started for the first time, there's a script called `contrib/bootstrap-node.sh` which will connect you to other nodes on the lightning network.
 
-There are also numerous plugins available for Core Lightning which add capabilities: see the [Plugins](doc:plugins) guide, and check out the plugin collection at: <https://github.com/lightningd/plugins>, including [helpme](https://github.com/lightningd/plugins/tree/master/helpme) which guides you through setting up your first channels and customising your node.
+There are also numerous plugins available for Core Lightning which add capabilities: see the [Plugins](doc:plugins) guide, and check out the plugin collection at: <https://github.com/lightningd/plugins>.
 
 For a less reckless experience, you can encrypt the HD wallet seed: see [HD wallet encryption](doc:backup-and-recovery#hsm-secret-backup).

doc/node-operators-guide/faq.md

@@ -8,34 +8,6 @@ updatedAt: "2023-07-05T09:42:38.017Z"
 ---
 # General questions
 
-### I don't know where to start, help me !
-
-There is a Core Lightning plugin specifically for this purpose, it's called [`helpme`](https://github.com/lightningd/plugins/tree/master/helpme).
-
-Assuming you have followed the [installation steps](doc:installation), have `lightningd` up and running, and `lightning-cli` in your `$PATH` you can start the plugin like so:
-
-```shell
-# Clone the plugins repository
-git clone https://github.com/lightningd/plugins
-# Make sure the helpme plugin is executable (git should have already handled this)
-chmod +x plugins/helpme/helpme.py
-# Install its dependencies (there is only one actually)
-pip3 install --user -r plugins/helpme/requirements.txt
-# Then just start it :)
-lightning-cli plugin start $PWD/plugins/helpme/helpme.py
-```
-
-
-
-The plugin registers a new command `helpme` which will guide you through the main  
-components of C-lightning:
-
-```shell
-lightning-cli helpme
-```
-
-
-
 ### How to get the balance of each channel ?
 
 You can use the `listfunds` command and take a ratio of `our_amount_msat` over