Core/Misc: Cleanup account instance times data from DB on account deletion.

(cherry picked from commit 0ebda1168aa08d2b4539de6304c3cbd806448152)

src/server/game/Accounts/AccountMgr.cpp

@@ -134,6 +134,10 @@ AccountOpResult AccountMgr::DeleteAccount(uint32 accountId)
     stmt->setUInt32(0, accountId);
     CharacterDatabase.Execute(stmt);
 
+    stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_ACCOUNT_INSTANCE_LOCK_TIMES);
+    stmt->setUInt32(0, accountId);
+    CharacterDatabase.Execute(stmt);
+
     LoginDatabaseTransaction trans = LoginDatabase.BeginTransaction();
 
     loginStmt = LoginDatabase.GetPreparedStatement(LOGIN_DEL_ACCOUNT);