Update TODOs

Author: ctrueden

src/main/java/org/scijava/desktop/platform/linux/DesktopFile.java

@@ -214,6 +214,7 @@ public static DesktopFile parse(final Path path) throws IOException {
 	 */
 	public void writeTo(final Path path) throws IOException {
 		final Path oldPath = this.path;
+		// TODO: oldPath is not used; and why is this method "for backward compatibility"? Do we actually need it?
 		// Temporarily change path, save, then restore
 		try {
 			// Create a temporary instance with the new path

src/main/java/org/scijava/desktop/platform/linux/LinuxPlatform.java

@@ -421,7 +421,8 @@ private synchronized Map<String, String> loadMimeTypeMapping() throws IOExceptio
 
 		extensionToMime = new LinkedHashMap<>();
 
-		// TODO: Query IOService for formats
+		// TODO: We need public API in LinkService for registering the extensions we want.
+		// TODO: Then, in fiji-links, we can use that API to plug in all the SCIFIO-supported file formats.
 
 		return extensionToMime;
 	}