Update TODO

Remove already completed items.
diff --git a/TODO b/TODO
index 07bb082..81fc962 100644
--- a/TODO
+++ b/TODO
@@ -15,9 +15,6 @@
 Possibly move code from entry_post in romlayout.S to C code in
 handle_resume and always call 16bit C code on post.
-Audit all sti/cli calls.  Audit all call16 calls to make sure flags is
-setup properly with respect to irqs.
 The __call16 code does a long jump to the interrupt trampolines - this
 is unnecessary.
@@ -29,8 +26,6 @@
 Add a kconfig style configuration program instead of requiring users
 to modify config.h.
-Support usb booting?  Support usb mice?
 Add a graphical boot splash screen?
 Possibly support sending debug information over EHCI debug port.