clean up TODO file. No real code changes.

TODO

@@ -7,19 +7,16 @@ have any suggestions how they plan to go about it, and to minimize conflicts
 between your work and theirs.  But otherwise, all of these are fair game.
 
 Rob Landley <rob@landley.net>:
-  Add BB_NOMMU to platform.h and migrate __uClinux__ tests to that.
-    #if defined __UCLIBC__ && !defined __ARCH_USE_MMU__
   Add a libbb/platform.c
     Implement fdprintf() for platforms that haven't got one.
     Implement bb_realpath() that can handle NULL on non-glibc.
     Cleanup bb_asprintf()
 
-  Migrate calloc() and bb_calloc() occurrences to bb_xzalloc().
   Remove obsolete _() wrapper crud for internationalization we don't do.
   Figure out where we need utf8 support, and add it.
 
   sh
-    The command shell situation is a big mess.  We have three or four different
+    The command shell situation is a big mess.  We have three different
     shells that don't really share any code, and the "standalone shell" doesn't
     work all that well (especially not in a chroot environment), due to apps not
     being reentrant.
@@ -123,9 +120,6 @@ Bernhard Fischer <busybox@busybox.net> suggests to look at these:
 
 As yet unclaimed:
 
-----
-find
-  doesn't understand (), lots of susv3 stuff.
 ----
 diff
   Make sure we handle empty files properly:
@@ -143,10 +137,6 @@ patch
   And while we're at it, a new patch filename quoting format is apparently
   coming soon:  http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
 ---
-ps / top
-  Add support for both RSS and VSIZE rather than just one or the other.
-  Or make it a build option.
----
 man
   It would be nice to have a man command.  Not one that handles troff or
   anything, just one that can handle preformatted ascii man pages, possibly
@@ -310,9 +300,6 @@ Code cleanup:
 
 Replace deprecated functions.
 
-bzero() -> memset()
----
-sigblock(), siggetmask(), sigsetmask(), sigmask() -> sigprocmask et al
 ---
 vdprintf() -> similar sized functionality
 ---