x86/asm: Remove unused TASK_TI_flags from asm-offsets.c

x86/asm: Remove unused TASK_TI_flags from asm-offsets.c

Since commit:

  21d375b6b34ff5 ("x86/entry/64: Remove the SYSCALL64 fast path")

there is no user of TASK_TI_flags in assembly. There's no need to
keep it around in asm-offsets.c

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20190523102325.22eacdf7@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>