ARM: OMAP1: Remove unused declarations in arch/arm/mach-omap1/pm.h

The omap1510_idle_loop_suspend/_sz() and omap1610_idle_loop_suspend/_sz()
has been removed since commit feb72f3b ("ARM: OMAP1: Remove
omap_sram_idle()"), so remove them.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Link: https://lore.kernel.org/r/20240813071125.1044697-1-cuigaosheng1@huawei.comSigned-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/mach-omap1/pm.h

@@ -114,13 +114,9 @@ extern void omap1_pm_suspend(void);
 
 extern void omap1510_cpu_suspend(unsigned long, unsigned long);
 extern void omap1610_cpu_suspend(unsigned long, unsigned long);
-extern void omap1510_idle_loop_suspend(void);
-extern void omap1610_idle_loop_suspend(void);
 
 extern unsigned int omap1510_cpu_suspend_sz;
 extern unsigned int omap1610_cpu_suspend_sz;
-extern unsigned int omap1510_idle_loop_suspend_sz;
-extern unsigned int omap1610_idle_loop_suspend_sz;
 
 #ifdef CONFIG_OMAP_SERIAL_WAKE
 extern void omap_serial_wake_trigger(int enable);