sleep-util: split battery-capacity into sleep/

This is only used by sleep.c. Let's start shrinking down
the "mixed" sleep-util.

src/shared/sleep-util.h

@@ -4,7 +4,6 @@
 #include <linux/fiemap.h>
 #include <sys/types.h>
 
-#include "hashmap.h"
 #include "time-util.h"
 
 #define DEFAULT_SUSPEND_ESTIMATION_USEC (1 * USEC_PER_HOUR)
@@ -69,15 +68,6 @@ int write_resume_config(dev_t devno, uint64_t offset, const char *device);
 int can_sleep(SleepOperation operation);
 int can_sleep_disk(char **types);
 int can_sleep_state(char **types);
-int get_total_suspend_interval(Hashmap *last_capacity, usec_t *ret);
-int fetch_batteries_capacity_by_name(Hashmap **ret_current_capacity);
-int get_capacity_by_name(Hashmap *capacities_by_name, const char *name);
-int estimate_battery_discharge_rate_per_hour(
-                Hashmap *last_capacity,
-                Hashmap *current_capacity,
-                usec_t before_timestamp,
-                usec_t after_timestamp);
-int battery_trip_point_alarm_exists(void);
 
 const char* sleep_operation_to_string(SleepOperation s) _const_;
 SleepOperation sleep_operation_from_string(const char *s) _pure_;