feat(richtext-lexical): remove unused json-schema dependency (#7072)

Makes @payloadcms/richtext-lexical a bit smaller. Only
@types/json-schema is required as a devDependency.

Author: AlessioGr

packages/payload/package.json

@@ -119,7 +119,7 @@
     "@payloadcms/eslint-config": "workspace:*",
     "@types/express-fileupload": "1.4.1",
     "@types/joi": "14.3.4",
-    "@types/json-schema": "7.0.12",
+    "@types/json-schema": "7.0.15",
     "@types/jsonwebtoken": "8.5.9",
     "@types/minimist": "1.2.2",
     "@types/nodemailer": "6.4.14",

packages/richtext-lexical/package.json

@@ -53,7 +53,6 @@
     "@types/uuid": "10.0.0",
     "bson-objectid": "2.0.4",
     "dequal": "2.0.3",
-    "json-schema": "^0.4.0",
     "lexical": "0.16.1",
     "react-error-boundary": "4.0.13",
     "uuid": "10.0.0"