Build: Drop individual AMD modules

With this change, jQuery build no longer generates the `amd` directory with
AMD modules transpiled from source `src` ECMAScript Modules. To use individual
jQuery modules from source, ESM is now required.

Note that this DOES NOT affect the main `"jquery"` AMD module defined by built
jQuery files; those remain supported.

Closes gh-5276

3 files changed, 1 insertions, 48 deletions

diff --git a/build/release.js b/build/release.js
index e7399c968..379f7de0a 100644
--- a/build/release.js
+++ b/build/release.js
@@ -32,12 +32,10 @@ module.exports = function( Release ) {
 		issueTracker: "github",
 
 		/**
-		 * Set the version in the src folder for distributing ES modules
-		 * and in the amd folder for AMD.
+		 * Set the version in the src folder for distributing ES modules.
 		 */
 		_setSrcVersion: function() {
 			setSrcVersion( `${ __dirname }/../src/core.js` );
-			setSrcVersion( `${ __dirname }/../amd/core.js` );
 		},
 
 		/**
diff --git a/build/release/dist.js b/build/release/dist.js
index ea7c64b8a..eb8adc7e7 100644
--- a/build/release/dist.js
+++ b/build/release/dist.js
@@ -13,7 +13,6 @@ module.exports = function( Release, files, complete ) {
 
 	// These files are included with the distribution
 	const extras = [
-		"amd",
 		"src",
 		"LICENSE.txt",
 		"AUTHORS.txt",
diff --git a/build/tasks/amd.js b/build/tasks/amd.js
deleted file mode 100644
index c4c9c8941..000000000
--- a/build/tasks/amd.js
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * Compiles sources from ES Modules in `src/` to AMD in `amd/`.
- */
-
-"use strict";
-
-module.exports = function( grunt ) {
-	const path = require( "path" );
-	const rimraf = require( "rimraf" );
-	const rollup = require( "rollup" );
-	const srcFolder = path.resolve( __dirname, "..", "..", "src" );
-	const amdFolder = path.resolve( srcFolder, "..", "amd" );
-	const inputFileName = "jquery.js";
-
-	const inputRollupOptions = {
-		input: path.resolve( srcFolder, inputFileName ),
-		preserveModules: true
-	};
-
-	const outputRollupOptions = {
-		format: "amd",
-		dir: "amd",
-		indent: false
-	};
-
-	grunt.registerTask(
-		"amd",
-		"Convert ES modules from `src/` to AMD modules in `amd/`",
-		async function() {
-			const done = this.async();
-
-			try {
-				grunt.verbose.writeln( "Removing the 'amd' directory..." );
-				rimraf( amdFolder, async function() {
-					const bundle = await rollup.rollup( inputRollupOptions );
-					await bundle.write( outputRollupOptions );
-					grunt.log.ok( "Sources from 'src' converted to AMD in 'amd'." );
-					done();
-				} );
-			} catch ( err ) {
-				done( err );
-			}
-		} );
-};