remove invalid layer() case

Author: bartveneman

src/index.js

@@ -98,13 +98,6 @@ export function layer_tree_from_ast(ast) {
 					return this.skip
 				}
 
-				// @import url("foo.css") layer();
-				let layer_fn = csstree.find(prelude, n => n.type === 'Function' && n.name.toLowerCase() === 'layer')
-				if (layer_fn) {
-					root.add_child([], get_anonymous_id(), location)
-					return this.skip
-				}
-
 				// @import url("foo.css") layer;
 				let layer_keyword = csstree.find(prelude, n => n.type === 'Identifier' && n.name.toLowerCase() === 'layer')
 				if (layer_keyword) {

test/import.spec.js

@@ -22,26 +22,6 @@ test('@import url() LAYER', () => {
 	assert.equal(actual, expected)
 })
 
-test('@import url() layer()', () => {
-	let actual = layer_tree('@import url("foo.css") layer();')
-	let expected = [{
-		name: '__anonymous-1__',
-		locations: [{ line: 1, column: 1, start: 0, end: 31 }],
-		children: []
-	}]
-	assert.equal(actual, expected)
-})
-
-test('@import url() LAYER()', () => {
-	let actual = layer_tree('@import url("foo.css") LAYER();')
-	let expected = [{
-		name: '__anonymous-1__',
-		locations: [{ line: 1, column: 1, start: 0, end: 31 }],
-		children: []
-	}]
-	assert.equal(actual, expected)
-})
-
 test('@import url() layer(named)', () => {
 	let actual = layer_tree('@import url("foo.css") layer(named);')
 	let expected = [{