Remove last playground references (#2075)

Author: jeluard

config/menus.js

@@ -62,10 +62,6 @@ const developers = [
     url: MARKETPLACE_URL,
     id: 'developers.marketplace',
   },
-  {
-    url: WEBSITE_URL + '/developers/playground/',
-    id: 'developers.playground',
-  },
   {
     url: WEBSITE_URL + '/developers/smart-contracts/',
     id: 'developers.smart-contracts',

content/locales/en/menus.json

@@ -15,7 +15,6 @@
   "developers.docs": "Docs",
   "developers.rustdocs": "Rust Docs",
   "developers.marketplace": "Marketplace",
-  "developers.playground": "Playground",
   "developers.smart-contracts": "Smart Contracts",
   "developers.substrate-connect": "Substrate Connect",
   "developers.rococo-network": "Rococo Network",

content/md/en/docs/learn/blockchain-basics.md

@@ -108,5 +108,3 @@ You can explore the following resources to learn more.
 - [Build a local blockchain](/tutorials/build-a-blockchain/build-local-blockchain/)
 - [Simulate a network](/tutorials/build-a-blockchain/simulate-network/)
 - [Add trusted nodes](/tutorials/build-a-blockchain/add-trusted-nodes/)
-
-If you prefer to explore code directly, you can start building in the [Substrate Playground](/playground/) or consult the API reference to get details about the Rust crates you use.

content/md/en/docs/tutorials/collectibles-workshop/01-prepare.md

@@ -8,10 +8,6 @@ To get the most out of this workshop, you'll want to have a working development
 To make sure you have everything you need, review this preflight checklist.
 If you discover something's missing, click the corresponding link.
 
-You can complete this workshop without setting up a local working environment if you use the [Substrate Playground](https://substrate.io/developers/playground/).
-However, if you use the Substrate Playground, the changes you make aren't saved when you end a session.
-If you use Substrate Playground, you can skip this checklist and go directly to [Get oriented](/tutorials/collectibles-workshop/02-orientation/), but be sure to save copies of the files you edit!
-
 The instructions in the workshop assume you are working in a local environment.
 
 ## Supported operating system
@@ -27,13 +23,13 @@ To set up a local development environment, you must have one of the following su
 Substrate is built using Rust, a modern type sound programming language.
 The Rust compiler minimizes the chances of errors getting into your code and produces binaries that run on most operating systems and WebAssembly targets.
 
-- [ ] Rust is installed locally or available in the browser using the Substrate playground.
+- [ ] Rust is installed locally.
 
   If you aren't sure, open a terminal and run `rustup show`.
   If Rust isn't installed on your computer, follow the instructions in [Install](/install) for your operating system.
   The last step in the installation instructions is to verify that the default node template compiles.
 
-- [ ] Substrate node compiles locally or is available in the browser using the Substrate playground.
+- [ ] Substrate node compiles locally.
 
 If you're new to Rust, keep in mind that this workshop isn’t about _learning_ Rust.
 However, for a brief introduction to a few important concepts, see [Detour: Learn Rust for Substrate](/tutorials/collectibles-workshop/detours/learn-rust/).

content/md/en/docs/tutorials/index.md

@@ -8,7 +8,6 @@ If you are someone who likes to learn by doing, the Substrate tutorials are a gr
 Tutorials don't provide much background about _why_ you are performing certain steps or explain the coding details.
 Instead, the tutorials give you hands-on experience performing the tasks essential to building your own blockchain and focus on ensuring a successful result.
 
-If you prefer to experiment on your own with less guidance, you might want to explore the [Substrate Playground](/playground/).
 If you prefer to dig into the details of the code directly, you might want to start with the [Rust API](https://paritytech.github.io/substrate/master/sc_service/index.html) documentation.
 But if you want to start your journey with a guided tour, try out the following tutorials.