chore: remove bundled IBM Plex fonts

packages/web/package.json

@@ -51,9 +51,6 @@
     "@codemirror/lang-cpp": "^6.0.3",
     "@codemirror/lang-go": "^6.0.1",
     "@eslint/js": "^9.33.0",
-    "@fontsource/ibm-plex-mono": "^5.2.7",
-    "@fontsource/ibm-plex-sans": "^5.1.1",
-    "@ibm/plex": "^6.4.1",
     "@radix-ui/react-collapsible": "^1.1.12",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",