Drop busname unit type

Since busname units are only useful with kdbus, they weren't actively
used. This was dead code, only compile-tested. If busname units are
ever added back, it'll be cleaner to start from scratch (possibly reverting
parts of this patch).

src/basic/special.h

@@ -46,7 +46,6 @@
 /* Early boot targets */
 #define SPECIAL_SYSINIT_TARGET "sysinit.target"
 #define SPECIAL_SOCKETS_TARGET "sockets.target"
-#define SPECIAL_BUSNAMES_TARGET "busnames.target"
 #define SPECIAL_TIMERS_TARGET "timers.target"
 #define SPECIAL_PATHS_TARGET "paths.target"
 #define SPECIAL_LOCAL_FS_TARGET "local-fs.target"

src/basic/unit-name.c

@@ -608,7 +608,6 @@ const char* unit_dbus_interface_from_type(UnitType t) {
         static const char *const table[_UNIT_TYPE_MAX] = {
                 [UNIT_SERVICE] = "org.freedesktop.systemd1.Service",
                 [UNIT_SOCKET] = "org.freedesktop.systemd1.Socket",
-                [UNIT_BUSNAME] = "org.freedesktop.systemd1.BusName",
                 [UNIT_TARGET] = "org.freedesktop.systemd1.Target",
                 [UNIT_DEVICE] = "org.freedesktop.systemd1.Device",
                 [UNIT_MOUNT] = "org.freedesktop.systemd1.Mount",
@@ -839,7 +838,6 @@ bool slice_name_is_valid(const char *name) {
 static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
         [UNIT_SERVICE] = "service",
         [UNIT_SOCKET] = "socket",
-        [UNIT_BUSNAME] = "busname",
         [UNIT_TARGET] = "target",
         [UNIT_DEVICE] = "device",
         [UNIT_MOUNT] = "mount",
@@ -884,19 +882,6 @@ static const char* const automount_state_table[_AUTOMOUNT_STATE_MAX] = {
 
 DEFINE_STRING_TABLE_LOOKUP(automount_state, AutomountState);
 
-static const char* const busname_state_table[_BUSNAME_STATE_MAX] = {
-        [BUSNAME_DEAD] = "dead",
-        [BUSNAME_MAKING] = "making",
-        [BUSNAME_REGISTERED] = "registered",
-        [BUSNAME_LISTENING] = "listening",
-        [BUSNAME_RUNNING] = "running",
-        [BUSNAME_SIGTERM] = "sigterm",
-        [BUSNAME_SIGKILL] = "sigkill",
-        [BUSNAME_FAILED] = "failed",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(busname_state, BusNameState);
-
 static const char* const device_state_table[_DEVICE_STATE_MAX] = {
         [DEVICE_DEAD] = "dead",
         [DEVICE_TENTATIVE] = "tentative",

src/basic/unit-name.h

@@ -28,7 +28,6 @@
 typedef enum UnitType {
         UNIT_SERVICE = 0,
         UNIT_SOCKET,
-        UNIT_BUSNAME,
         UNIT_TARGET,
         UNIT_DEVICE,
         UNIT_MOUNT,
@@ -73,19 +72,6 @@ typedef enum AutomountState {
         _AUTOMOUNT_STATE_INVALID = -1
 } AutomountState;
 
-typedef enum BusNameState {
-        BUSNAME_DEAD,
-        BUSNAME_MAKING,
-        BUSNAME_REGISTERED,
-        BUSNAME_LISTENING,
-        BUSNAME_RUNNING,
-        BUSNAME_SIGTERM,
-        BUSNAME_SIGKILL,
-        BUSNAME_FAILED,
-        _BUSNAME_STATE_MAX,
-        _BUSNAME_STATE_INVALID = -1
-} BusNameState;
-
 /* We simply watch devices, we cannot plug/unplug them. That
  * simplifies the state engine greatly */
 typedef enum DeviceState {
@@ -339,9 +325,6 @@ UnitActiveState unit_active_state_from_string(const char *s) _pure_;
 const char* automount_state_to_string(AutomountState i) _const_;
 AutomountState automount_state_from_string(const char *s) _pure_;
 
-const char* busname_state_to_string(BusNameState i) _const_;
-BusNameState busname_state_from_string(const char *s) _pure_;
-
 const char* device_state_to_string(DeviceState i) _const_;
 DeviceState device_state_from_string(const char *s) _pure_;