Remove classic Babel test

Babel no longer supports `null` as a pragma as a keyword,
instead it forces that as a string (`'null'`), which we can’t
handle.

Author: wooorm

script/generate-jsx.js

@@ -60,16 +60,6 @@ fs.writeFileSync(
   ).value
 )
 
-fs.writeFileSync(
-  path.join('test', 'jsx-babel-classic.js'),
-  // @ts-expect-error Result always given.
-  babel.transform(doc.replace(/'name'/, "'jsx (babel, classic)'"), {
-    plugins: [
-      ['@babel/plugin-transform-react-jsx', {pragma: 'x', pragmaFrag: 'null'}]
-    ]
-  }).code
-)
-
 fs.writeFileSync(
   path.join('test', 'jsx-babel-automatic.js'),
   // @ts-expect-error Result always given.

test/index.js

@@ -1,6 +1,5 @@
 /* eslint-disable import/no-unassigned-import */
 import './core.js'
-import './jsx-babel-classic.js'
 import './jsx-babel-automatic.js'
 import './jsx-build-jsx-classic.js'
 import './jsx-build-jsx-automatic.js'