Do not display stack in price tooltips

Displaying amount of items in stack is unnecessary because the
information is shown on item itself, so it is just making the tooltip
unnecessary big.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/plugins/itemprices/ItemPricesOverlay.java

@@ -217,10 +217,6 @@ class ItemPricesOverlay extends Overlay
 
 	private String stackValueText(int qty, int gePrice, int haValue)
 	{
-		if (qty > 1)
-		{
-			itemStringBuilder.append("(").append(qty).append(") ");
-		}
 		if (gePrice > 0)
 		{
 			itemStringBuilder.append("EX: ")