remove unused lib

Author: Feiyang1

package.json

@@ -139,7 +139,6 @@
     "ora": "5.4.1",
     "prettier": "2.3.1",
     "protractor": "5.4.2",
-    "rxjs": "6.6.3",
     "semver": "7.3.4",
     "simple-git": "2.40.0",
     "sinon": "9.2.2",

yarn.lock

@@ -14216,13 +14216,6 @@ run-queue@^1.0.0, run-queue@^1.0.3:
   dependencies:
     aproba "^1.1.1"
 
-[email protected]:
-  version "6.6.3"
-  resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.6.3.tgz#8ca84635c4daa900c0d3967a6ee7ac60271ee552"
-  integrity sha512-trsQc+xYYXZ3urjOiJOuCOa5N3jAZ3eiSpQB5hIT8zGlL2QfnHLJ2r7GMkBGuIausdJN1OneaI6gQlsqNHHmZQ==
-  dependencies:
-    tslib "^1.9.0"
-
 rxjs@^6.3.3, rxjs@^6.4.0, rxjs@^6.5.1, rxjs@^6.6.0, rxjs@^6.6.6:
   version "6.6.7"
   resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz#90ac018acabf491bf65044235d5863c4dab804c9"