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/client/components/Maps.ts

@@ -24,7 +24,6 @@ export const MapDescription: Record<keyof typeof GameMapType, string> = {
   Iceland: "Iceland",
   Japan: "Japan",
   BetweenTwoSeas: "Between Two Seas",
-  KnownWorld: "Known World",
   FaroeIslands: "Faroe Islands",
   DeglaciatedAntarctica: "Deglaciated Antarctica",
   FalklandIslands: "Falkland Islands",

src/client/utilities/Maps.ts

@@ -14,7 +14,6 @@ import gatewayToTheAtlantic from "../../../resources/maps/GatewayToTheAtlanticTh
 import halkidiki from "../../../resources/maps/HalkidikiThumb.webp";
 import iceland from "../../../resources/maps/IcelandThumb.webp";
 import japan from "../../../resources/maps/JapanThumb.webp";
-import knownworld from "../../../resources/maps/KnownWorldThumb.webp";
 import mars from "../../../resources/maps/MarsThumb.webp";
 import mena from "../../../resources/maps/MenaThumb.webp";
 import northAmerica from "../../../resources/maps/NorthAmericaThumb.webp";
@@ -66,8 +65,6 @@ export function getMapsImage(map: GameMapType): string {
       return japan;
     case GameMapType.BetweenTwoSeas:
       return betweenTwoSeas;
-    case GameMapType.KnownWorld:
-      return knownworld;
     case GameMapType.FaroeIslands:
       return faroeislands;
     case GameMapType.DeglaciatedAntarctica: