Core/Misc: Remove some calls to const_cast

src/server/game/Server/WorldSession.cpp

@@ -961,7 +961,7 @@ void WorldSession::ReadAddonsInfo(WorldPacket &data)
     ByteBuffer addonInfo;
     addonInfo.resize(size);
 
-    if (uncompress(const_cast<uint8*>(addonInfo.contents()), &uSize, const_cast<uint8*>(data.contents() + pos), data.size() - pos) == Z_OK)
+    if (uncompress(addonInfo.contents(), &uSize, data.contents() + pos, data.size() - pos) == Z_OK)
     {
         uint32 addonsCount;
         addonInfo >> addonsCount;                         // addons count