build: remove rxjs in peer dep

Author: tienne

package.json

@@ -49,7 +49,6 @@
   "peerDependencies": {
     "@nestjs/common": "^6.10.0 || ^7.0.0 || ^8.0.0",
     "reflect-metadata": "^0.1.13",
-    "rxjs": "^6.0.0",
     "@slynova/flydrive": "^1.0.2",
     "@slynova/flydrive-gcs": "^1.0.2",
     "@slynova/flydrive-s3": "^1.0.2"