remove collisiongrid, it doesnt belongs to this project

pkg/data/data.go

@@ -29,8 +29,6 @@ type Data struct {
 	Monsters                Monsters
 	Corpses                 Monsters
 	Game                    OnlineGame
-	// First slice represents X and second Y
-	CollisionGrid           [][]bool
 	PlayerUnit              PlayerUnit
 	NPCs                    NPCs
 	Inventory               Inventory
@@ -85,23 +83,6 @@ func (r Room) IsInside(p Position) bool {
 	return false
 }
 
-func (r Room) GetWalkableTiles(d Data, room Room) []Position {
-	var walkableTiles []Position
-
-	for x := room.X; x < room.X+room.Width; x++ {
-		for y := room.Y; y < room.Y+room.Height; y++ {
-			if d.CollisionGrid[x][y] {
-				walkableTiles = append(walkableTiles, Position{
-					X: x,
-					Y: y,
-				})
-			}
-		}
-	}
-
-	return walkableTiles
-}
-
 func (d Data) MercHPPercent() int {
 	for _, m := range d.Monsters {
 		if m.IsMerc() {