[General] Remove attackerGuid from mwmp::Attack because it is redundant

apps/openmw/mwclass/npc.cpp

@@ -930,7 +930,6 @@ namespace MWClass
         {
             mwmp::Attack *attack = &mwmp::Main::get().getLocalPlayer()->attack;
             attack->damage = damage;
-            attack->attackerGuid = mwmp::Main::get().getLocalPlayer()->guid;
             attack->targetGuid = victimPlayer->guid;
             attack->knockdown = getCreatureStats(ptr).getKnockedDown();
             mwmp::Main::get().getLocalPlayer()->sendAttack(mwmp::Attack::MELEE); // todo: make this sensitive to different weapon types

apps/openmw/mwmp/LocalPlayer.cpp

@@ -532,7 +532,6 @@ void LocalPlayer::updateAttackState(bool forceUpdate)
         {
             const string &spell = MWBase::Environment::get().getWindowManager()->getSelectedSpell();
 
-            attack.attackerGuid = guid;
             attack.type = Attack::MAGIC;
             attack.pressed = true;
             attack.spellId = spell;
@@ -1197,7 +1196,6 @@ void LocalPlayer::prepareAttack(Attack::TYPE type, bool state)
     attack.knockdown = false;
     attack.block = false;
     attack.targetGuid = RakNet::RakNetGUID();
-    attack.attackerGuid = guid;
 
     getNetworking()->getPlayerPacket(ID_PLAYER_ATTACK)->setPlayer(this);
     getNetworking()->getPlayerPacket(ID_PLAYER_ATTACK)->Send();

components/openmw-mp/Base/BaseStructs.hpp

@@ -9,7 +9,6 @@ namespace mwmp
     {
     public:
         RakNet::RakNetGUID targetGuid;
-        RakNet::RakNetGUID attackerGuid;
 
         char type; // 0 - melee, 1 - magic, 2 - throwable
         enum TYPE

components/openmw-mp/Packets/Player/PacketPlayerAttack.cpp

@@ -16,7 +16,6 @@ void PacketPlayerAttack::Packet(RakNet::BitStream *bs, bool send)
 {
     PlayerPacket::Packet(bs, send);
 
-    RW(player->attack.attackerGuid, send);
     RW(player->attack.targetGuid, send);
 
     RW(player->attack.spellId, send);