Revert "am be741d47: am 2f460fbe: am 73b5cad9: Merge "bionic: Fix wrong kernel_id in pthread descriptor after fork()""

This reverts commit 76d56cf4a9, reversing
changes made to c59ba4595b.

Bug: 6157577

libc/bionic/fork.c

@@ -27,7 +27,6 @@
  */
 #include <unistd.h>
 #include "pthread_internal.h"
-#include "bionic_pthread.h"
 #include "cpuacct.h"
 
 extern int  __fork(void);
@@ -49,9 +48,6 @@ int  fork(void)
         __timer_table_start_stop(0);
         __bionic_atfork_run_parent();
     } else {
-        /* Adjusting the kernel id after a fork */
-        (void)__pthread_settid(pthread_self(), gettid());
-
         /*
          * Newly created process must update cpu accounting.
          * Call cpuacct_add passing in our uid, which will take