Remove mui from list of transpiled packages

- I can't see this mentioned anywhere in the docs
- Removing it didn't break anything dev / preview

web/package.json

@@ -27,6 +27,7 @@
         "dev:photos": "yarn workspace photos next dev",
         "lint": "yarn prettier --check . && yarn workspaces run eslint .",
         "lint-fix": "yarn prettier --write . && yarn workspaces run eslint --fix .",
+        "preview": "yarn preview:photos",
         "preview:accounts": "yarn build:accounts && python3 -m http.server -d apps/accounts/out 3001",
         "preview:auth": "yarn build:auth && python3 -m http.server -d apps/auth/out 3000",
         "preview:cast": "yarn build:cast && python3 -m http.server -d apps/accounts/out 3001",

web/packages/next/next.config.base.js

@@ -45,19 +45,13 @@ const gitSHA = () => {
  * @type {import("next").NextConfig}
  */
 const nextConfig = {
-    /* generate a static export when we run `next build` */
+    // Generate a static export when we run `next build`.
     output: "export",
     compiler: {
         emotion: true,
     },
-    transpilePackages: [
-        "@/next",
-        "@/ui",
-        "@/utils",
-        "@mui/material",
-        "@mui/system",
-        "@mui/icons-material",
-    ],
+    // Use Next.js to transpile our internal packages before bundling them.
+    transpilePackages: ["@/next", "@/ui", "@/utils"],
 
     // Add environment variables to the JavaScript bundle. They will be
     // available as `process.env.VAR_NAME` to our code.