chore: remove unused files (#7509)

chore remove unused files

packages/excalidraw/main.js

@@ -1,5 +0,0 @@
-if (process.env.NODE_ENV !== "development") {
-  import("./dist/dev/index.js");
-} else {
-  import("./dist/prod/index.js");
-}

packages/excalidraw/tsconfig-types.json

@@ -1,20 +0,0 @@
-{
-  "include": ["./**/*"],
-  "exclude": ["**/*.test.*", "tests", "types"],
-  "compilerOptions": {
-    "types": ["vite/client", "vite-plugin-svgr/client"],
-    "allowJs": true,
-    "declaration": true,
-    "emitDeclarationOnly": true,
-    "outDir": "types",
-    "jsx": "react-jsx",
-    "target": "es6",
-    "lib": ["dom", "dom.iterable", "esnext"],
-    "module": "ESNext",
-    "moduleResolution": "node",
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "allowSyntheticDefaultImports": true,
-    "strict": true
-  }
-}