chore: Remove some less useful demos.

examples/README.md

@@ -36,14 +36,9 @@ The [Blockly Codelabs](https://blocklycodelabs.dev/) refer to this example code.
 
 ### Integrating Blockly
 
-- [``blockly-requirejs-sample``](blockly-requirejs/): Loads RequireJS from a CDN and loads Blockly using ``AMD``.
-- [``blockly-umd-sample``](blockly-umd/): Loads the UMD build of Blockly (``blockly.min.js``), both from node_modules and from Unpkg.
-- [``blockly-webpack-sample``](blockly-webpack/): Using Blockly in Webpack.
-- [``blockly-node-sample``](blockly-node/): Using Blockly in Node.js, loaded using require (``CommonJS``).
 - [``blockly-angular-sample``](blockly-angular/): Blockly in an Angular project, defines an Angular Blockly Component.
 - [``blockly-react-sample``](blockly-react/): Blockly in a React project, defines a React Blockly Component.
 - [``blockly-svelte-sample``](blockly-svelte/): Blockly in a Svelte project, defines a Svelte Blockly Component.
-- [``blockly-vue-sample``](blockly-vue/): Blockly in a Vue project, defines a Vue Blockly Component.
 - [``blockly-vue3-sample``](blockly-vue3/): Blockly in a Vue3 project, defines a Vue Blockly Component.
 - [``blockly-parcel``](blockly-parcel/): Using Blockly with Parcel.