remove unused code, add todo comment

sokra · sokra · commit 3d99168a67d0 · 2017-09-13T17:21:38.000+02:00
diff --git a/lib/CachePlugin.js b/lib/CachePlugin.js
@@ -13,15 +13,14 @@ class CachePlugin {
 	}
 
 	apply(compiler) {
-		const cacheMap = new Map();
-		cacheMap.set(compiler, this.cache);
 		if(Array.isArray(compiler.compilers)) {
 			compiler.compilers.forEach((c, idx) => {
 				c.apply(new CachePlugin(this.cache[idx] = this.cache[idx] || {}));
 			});
 		} else {
 			const registerCacheToCompiler = (compiler, cache) => {
 				compiler.plugin("this-compilation", compilation => {
+					// TODO remove notCacheable for webpack 4
 					if(!compilation.notCacheable) {
 						compilation.cache = cache;
 						compilation.plugin("child-compiler", (childCompiler, compilerName, compilerIndex) => {
