profiling: Remove unused timer hook

The last remaining user was oprofile and its use has been removed
a while ago on commit bc078e4eab65f11bbaeed380593ab8151b30d703
"oprofile: convert oprofile from timer_hook to hrtimer".

There doesn't seem to be any upstream user of this hook
for about two years now. And I'm not even aware of any out of tree

Let's remove it.

Signed-off-by: Frederic Weisbecker <>
Cc: Alessio Igor Bogani <>
Cc: Andrew Morton <>
Cc: Chris Metcalf <>
Cc: Christoph Lameter <>
Cc: Geoff Levand <>
Cc: Gilad Ben Yossef <>
Cc: Hakan Akkan <>
Cc: Ingo Molnar <>
Cc: Paul E. McKenney <>
Cc: Paul Gortmaker <>
Cc: Peter Zijlstra <>
Cc: Steven Rostedt <>
Cc: Thomas Gleixner <>
2 files changed