Remove obsolete comments and code

Author: Gary Gregory

src/main/java/org/apache/commons/io/file/PathUtils.java

@@ -1093,10 +1093,7 @@ public static OutputStream newOutputStream(final Path path, final boolean append
     }
 
     static OutputStream newOutputStream(final Path path, final LinkOption[] linkOptions, final OpenOption... openOptions) throws IOException {
-        if (exists(path, linkOptions)) {
-            // requireFile(path, "path");
-            // requireCanWrite(path, "path");
-        } else {
+        if (!exists(path, linkOptions)) {
             createParentDirectories(path, linkOptions != null && linkOptions.length > 0 ? linkOptions[0] : NULL_LINK_OPTION);
         }
         final List<OpenOption> list = new ArrayList<>(Arrays.asList(openOptions != null ? openOptions : EMPTY_OPEN_OPTION_ARRAY));
@@ -1266,22 +1263,6 @@ static List<Path> relativize(final Collection<Path> collection, final Path paren
         return stream.collect(Collectors.toList());
     }
 
-    /**
-     * Throws an {@link IllegalArgumentException} if the file is not writable. This provides a more precise exception
-     * message than a plain access denied.
-     *
-     * @param file The file to test.
-     * @param name The parameter name to use in the exception message.
-     * @throws NullPointerException if the given {@code Path} is {@code null}.
-     * @throws IllegalArgumentException if the file is not writable.
-     */
-    private static void requireCanWrite(final Path file, final String name) {
-        Objects.requireNonNull(file, "file");
-        if (!Files.isWritable(file)) {
-            throw new IllegalArgumentException("File parameter '" + name + " is not writable: '" + file + "'");
-        }
-    }
-
     /**
      * Requires that the given {@code File} exists and throws an {@link IllegalArgumentException} if it doesn't.
      *
@@ -1300,23 +1281,6 @@ private static Path requireExists(final Path file, final String fileParamName, f
         return file;
     }
 
-    /**
-     * Requires that the given {@code Path} is a regular file.
-     *
-     * @param file The {@code Path} to check.
-     * @param name The parameter name to use in the exception message.
-     * @return the given file.
-     * @throws NullPointerException if the given {@code Path} is {@code null}.
-     * @throws IllegalArgumentException if the given {@code Path} does not exist or is not a regular file.
-     */
-    private static Path requireFile(final Path file, final String name) {
-        Objects.requireNonNull(file, name);
-        if (!Files.isRegularFile(file)) {
-            throw new IllegalArgumentException("Parameter '" + name + "' is not a regular file: " + file);
-        }
-        return file;
-    }
-
     private static boolean setDosReadOnly(final Path path, final boolean readOnly, final LinkOption... linkOptions) throws IOException {
         final DosFileAttributeView dosFileAttributeView = getDosFileAttributeView(path, linkOptions);
         if (dosFileAttributeView != null) {