Remove unneeded #included files in 2001/anonymous

These were part of debugging the reason execv() did not run the target
program but I forgot to remove them once I found out it was a text file
busy error.

Also added to README.md another git diff to try as it might be
instructive.

2001/anonymous/README.md

@@ -53,6 +53,7 @@ git diff d2a42f42e8f477f29e9d5ed09ce2bb349eaf7397..93aa8d79f208dcccc3c5a2370a727
 git diff 93aa8d79f208dcccc3c5a2370a727b5cf64e9c53..c48629017117379a52b1a512ef8f2593ca9569c8 anonymous.c
 git diff c48629017117379a52b1a512ef8f2593ca9569c8..efdee208a2bc650256637b9357ddfd0de82d2f41 anonymous.c
 git diff efdee208a2bc650256637b9357ddfd0de82d2f41..e9a3f77ea3b209e63ac3f9c06bb84ad86e5ea706 anonymous.c
+git diff d2a42f42e8f477f29e9d5ed09ce2bb349eaf7397..2159caec4677e0f25ad704a74e04c8196fd6c343 anonymous.c
 ```
 
 Thank you Cody for your assistance!

2001/anonymous/anonymous.c

@@ -5,8 +5,6 @@
 #include <stdlib.h>
 #include <strings.h>
 #include <sys/mman.h>
-#include <string.h>
-#include <errno.h>
 
 #define l int*
 #define F char