Remove CUnitSound::Repair

The engine never plays this sound.  Until r7108 on 2005-03-20, it was
used in AnimateActionBuild and DoActionRepairGeneric.  Nowadays, the
animation script names the sound instead, so it need not be defined in
the unit type.

include/unit.h

@@ -461,7 +461,6 @@ enum UnitVoiceGroup {
 	VoiceWorkCompleted,     /// only worker, work completed
 	VoiceBuilding,          /// only for building under construction
 	VoiceDocking,           /// only for transport reaching coast
-	VoiceRepairing,         /// repairing
 };
 
 /**

include/unitsound.h

@@ -66,7 +66,6 @@ public:
 	SoundConfig Selected;           /// selected by user
 	SoundConfig Acknowledgement;    /// acknowledge of use command
 	SoundConfig Ready;              /// unit training... ready
-	SoundConfig Repair;             /// unit repairing
 	SoundConfig Help;               /// unit is attacked
 	SoundConfig Dead;               /// unit is killed
 };

sound/sound.cpp

@@ -188,8 +188,6 @@ static CSound *ChooseUnitVoiceSound(const CUnit *unit, UnitVoiceGroup voice)
 			return GameSounds.BuildingConstruction.Sound;
 		case VoiceDocking:
 			return GameSounds.Docking.Sound;
-		case VoiceRepairing:
-			return unit->Type->Sound.Repair.Sound;
 	}
 
 	return NO_SOUND;

sound/unitsound.cpp

@@ -121,10 +121,6 @@ void MapUnitSounds(void)
 				SetSoundRange(type->Sound.Ready.Sound,
 					INFINITE_SOUND_RANGE);
 			}
-			if (!type->Sound.Repair.Name.empty()) {
-				type->Sound.Repair.Sound =
-					SoundForName(type->Sound.Repair.Name);
-			}
 			if (!type->Sound.Help.Name.empty()) {
 				type->Sound.Help.Sound =
 					SoundForName(type->Sound.Help.Name);

unit/script_unittype.cpp

@@ -605,8 +605,6 @@ static int CclDefineUnitType(lua_State *l)
 					type->Sound.Acknowledgement.Name = LuaToString(l, -1, k + 1);
 				} else if (!strcmp(value, "ready")) {
 					type->Sound.Ready.Name = LuaToString(l, -1, k + 1);
-				} else if (!strcmp(value, "repair")) {
-					type->Sound.Repair.Name = LuaToString(l, -1, k + 1);
 				} else if (!strcmp(value, "help")) {
 					type->Sound.Help.Name = LuaToString(l, -1, k + 1);
 				} else if (!strcmp(value, "dead")) {