Axe automated header generation.

Reasoning:
 - implementation was unsound -- broke down when I added a fairly
   basic macro definition expanding to a struct initializer in a *.c
   file.

 - made it way too easy (e.g. via otherwise totally innocuous git
   commands) to end up with timestamps such that it always ran
   MakeHeader.py but never used its output, leading to overbuild noise
   when running what should be a null 'make'.

 - but mostly: it's just an awkward way of dealing with C code.

openbsd/OpenBSDProcess.c

@@ -16,26 +16,6 @@ in the source distribution for its full text.
 #include <unistd.h>
 #include <sys/syscall.h>
 
-/*{
-
-typedef enum OpenBSDProcessFields {
-   // Add platform-specific fields here, with ids >= 100
-   LAST_PROCESSFIELD = 100,
-} OpenBSDProcessField;
-
-typedef struct OpenBSDProcess_ {
-   Process super;
-} OpenBSDProcess;
-
-#ifndef Process_isKernelThread
-#define Process_isKernelThread(_process) (_process->pgrp == 0)
-#endif
-
-#ifndef Process_isUserlandThread
-#define Process_isUserlandThread(_process) (_process->pid != _process->tgid)
-#endif
-
-}*/
 
 ProcessClass OpenBSDProcess_class = {
    .super = {