Remove unnecessary from2dTo1dIndex method of isometricLevel

Author: gugiserman

src/kaboom.ts

@@ -2509,10 +2509,6 @@ function addIsometricLevel(map: string[], options: IsometricLevelOpt): Isometric
 			return vec2((col - row) * halfTileWidth, (col + row) * halfTileHeight);
 		},
 
-		from2dTo1dIndex: (row: number, col: number): number => {
-			return row * maxWidthInTiles + col
-		},
-
 		spawn: (position: Vec2, symbol: string): GameObj => {
 			const comps = (() => {
 				if (options[symbol]) {

src/types.ts

@@ -3850,7 +3850,6 @@ export interface IsometricLevel {
 	gridHeight(): number,
 	offset(): Vec2,
 	fromIsometricCoordsToWorldPos(row: number, col: number): Vec2,
-	from2dTo1dIndex(row: number, col: number): number,
 	width(): number,
 	height(): number,
 	destroy(): void,