nptl: Move thrd_exit into libc

The symbol was moved using scripts/move-symbol-to-libc.py.

The __pthread_exit@@GLIBC_PRIVATE symbol is no longer needed
after this change, so remove it.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>

sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist

@@ -1834,6 +1834,7 @@ GLIBC_2.33 tfind F
 GLIBC_2.33 tgkill F
 GLIBC_2.33 thrd_current F
 GLIBC_2.33 thrd_equal F
+GLIBC_2.33 thrd_exit F
 GLIBC_2.33 thrd_sleep F
 GLIBC_2.33 thrd_yield F
 GLIBC_2.33 time F
@@ -2068,3 +2069,4 @@ GLIBC_2.34 pthread_spin_init F
 GLIBC_2.34 pthread_spin_lock F
 GLIBC_2.34 pthread_spin_trylock F
 GLIBC_2.34 pthread_spin_unlock F
+GLIBC_2.34 thrd_exit F

sysdeps/unix/sysv/linux/riscv/rv32/libpthread.abilist

@@ -75,7 +75,6 @@ GLIBC_2.33 sem_unlink F
 GLIBC_2.33 sem_wait F
 GLIBC_2.33 thrd_create F
 GLIBC_2.33 thrd_detach F
-GLIBC_2.33 thrd_exit F
 GLIBC_2.33 thrd_join F
 GLIBC_2.33 tss_create F
 GLIBC_2.33 tss_delete F

sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist

@@ -2177,6 +2177,7 @@ GLIBC_2.28 renameat2 F
 GLIBC_2.28 statx F
 GLIBC_2.28 thrd_current F
 GLIBC_2.28 thrd_equal F
+GLIBC_2.28 thrd_exit F
 GLIBC_2.28 thrd_sleep F
 GLIBC_2.28 thrd_yield F
 GLIBC_2.29 getcpu F
@@ -2268,3 +2269,4 @@ GLIBC_2.34 pthread_spin_init F
 GLIBC_2.34 pthread_spin_lock F
 GLIBC_2.34 pthread_spin_trylock F
 GLIBC_2.34 pthread_spin_unlock F
+GLIBC_2.34 thrd_exit F

sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist

@@ -71,7 +71,6 @@ GLIBC_2.27 sem_unlink F
 GLIBC_2.27 sem_wait F
 GLIBC_2.28 thrd_create F
 GLIBC_2.28 thrd_detach F
-GLIBC_2.28 thrd_exit F
 GLIBC_2.28 thrd_join F
 GLIBC_2.28 tss_create F
 GLIBC_2.28 tss_delete F