remove unnecessary method and TODO

This method was needed for a workaround that is outdated. So it can be removed safely.

resources/bundles/org.eclipse.core.filesystem/src/org/eclipse/core/filesystem/ZipFileUtil.java

@@ -46,21 +46,10 @@ public static boolean isInsideOpenZipFile(IFileStore store) {
 		return store instanceof ZipFileStore;
 	}
 
-	public static boolean isInsideOpenZipFile(URI locationURI) {
-		IFileStore store;
-		try {
-			store = EFS.getStore(locationURI);
-		} catch (CoreException e) {
-			return false;
-		}
-		return isInsideOpenZipFile(store);
-	}
-
-	//TODO Implement this method
 	public static boolean isOpenZipFile(IFileStore store) {
 		if (isInsideOpenZipFile(store)) {
 			ZipFileStore zipStore = (ZipFileStore) store;
-			return zipStore.getPath().isEmpty(); //if path is empty its the root
+			return zipStore.getPath().isEmpty(); //if path is empty it's the root
 		}
 		return false;
 	}