oprofile: Fix oprofile_timer_exit() breakage

Removing remainings of oprofile_timer_exit() completly.

Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
index 6efc18b..113d7cb 100644
--- a/arch/s390/oprofile/init.c
+++ b/arch/s390/oprofile/init.c
@@ -171,7 +171,6 @@
 
 static void oprofile_hwsampler_exit(void)
 {
-	oprofile_timer_exit();
 	hwsampler_shutdown();
 }
 
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h
index 769fb0f..d32ef81 100644
--- a/drivers/oprofile/oprof.h
+++ b/drivers/oprofile/oprof.h
@@ -35,7 +35,6 @@
 
 void oprofile_create_files(struct super_block *sb, struct dentry *root);
 int oprofile_timer_init(struct oprofile_operations *ops);
-void oprofile_timer_exit(void);
 #ifdef CONFIG_OPROFILE_NMI_TIMER
 int op_nmi_timer_init(struct oprofile_operations *ops);
 #else