sh: hw-breakpoints: Kill off stub unthrottle callback.

This follows the x86 change and kills off the unthrottle stub. As the x86
change killed off the generic callback it isn't used anymore anyways.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/hw_breakpoint.h

@@ -56,7 +56,6 @@ extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
 int arch_install_hw_breakpoint(struct perf_event *bp);
 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
 void hw_breakpoint_pmu_read(struct perf_event *bp);
-void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
 
 extern void arch_fill_perf_breakpoint(struct perf_event *bp);
 extern int register_sh_ubc(struct sh_ubc *);

arch/sh/kernel/hw_breakpoint.c

@@ -425,11 +425,6 @@ void hw_breakpoint_pmu_read(struct perf_event *bp)
 	/* TODO */
 }
 
-void hw_breakpoint_pmu_unthrottle(struct perf_event *bp)
-{
-	/* TODO */
-}
-
 int register_sh_ubc(struct sh_ubc *ubc)
 {
 	/* Bail if it's already assigned */