remove known world (#914)

## Description:
Remove known world map to avoid copyright infringement.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

<DISCORD USERNAME>

src/core/configuration/DefaultConfig.ts

@@ -62,7 +62,6 @@ const numPlayersConfig = {
   [GameMapType.Pangaea]: [40, 20, 30],
   [GameMapType.World]: [150, 80, 50],
   [GameMapType.WorldMapGiant]: [150, 100, 60],
-  [GameMapType.KnownWorld]: [50, 40, 30],
   [GameMapType.Halkidiki]: [50, 40, 30],
 } as const satisfies Record<GameMapType, [number, number, number]>;
 

src/core/game/Game.ts

@@ -72,7 +72,6 @@ export enum GameMapType {
   Iceland = "Iceland",
   Japan = "Japan",
   BetweenTwoSeas = "Between Two Seas",
-  KnownWorld = "Known World",
   FaroeIslands = "Faroe Islands",
   DeglaciatedAntarctica = "Deglaciated Antarctica",
   FalklandIslands = "Falkland Islands",
@@ -109,7 +108,6 @@ export const mapCategories: Record<string, GameMapType[]> = {
   fantasy: [
     GameMapType.Pangaea,
     GameMapType.Mars,
-    GameMapType.KnownWorld,
     GameMapType.DeglaciatedAntarctica,
   ],
 };

src/core/game/TerrainMapFileLoader.ts

@@ -41,7 +41,6 @@ const MAP_FILE_NAMES: Record<GameMapType, string> = {
   [GameMapType.Iceland]: "Iceland",
   [GameMapType.Japan]: "Japan",
   [GameMapType.BetweenTwoSeas]: "BetweenTwoSeas",
-  [GameMapType.KnownWorld]: "KnownWorld",
   [GameMapType.FaroeIslands]: "FaroeIslands",
   [GameMapType.DeglaciatedAntarctica]: "DeglaciatedAntarctica",
   [GameMapType.EuropeClassic]: "EuropeClassic",