(PC-9075) Remove unused library react-content-loader

Ref: high CPU usage that may be responsible for the crash on Android: danilowoz/react-content-loader#125

package.json

@@ -74,7 +74,6 @@
  "make-plural": "^6.2.2",
  "patch-package": "^6.2.0",
  "react": "16.13.1",
- "react-content-loader": "^5.1.4",
  "react-error-boundary": "^3.1.0",
  "react-native": "0.63.3",
  "react-native-android-keyboard-adjust": "^1.2.0",

yarn.lock

@@ -10218,11 +10218,6 @@ [email protected]:
  resolved "https://registry.yarnpkg.com/react-async-hook/-/react-async-hook-3.6.1.tgz#aed3e492d87319392865c83ed7cef3609e2a7fef"
  integrity sha512-YWBB2feVQF79t5u2raMPHlZ8975Jds+guCvkWVC4kRLDlSCouLsYpQm4DGSqPeHvoHYVVcDfqNayLZAXQmnxnw==
 
-react-content-loader@^5.1.4:
- version "5.1.4"
- resolved "https://registry.yarnpkg.com/react-content-loader/-/react-content-loader-5.1.4.tgz#854bafe4415dd9de07174621375bc308edd0ebb5"
- integrity sha512-hTq7pZi2GKCK6a9d3u6XStozm0QGCEjw8cSqQReiWnh2up6IwCha5R5TF0o6SY5qUDpByloEZEZtnFxpJyENFw==
-
 react-devtools-core@^4.6.0:
  version "4.8.2"
  resolved "https://registry.yarnpkg.com/react-devtools-core/-/react-devtools-core-4.8.2.tgz#4465f2e8de7795564aa20f28b2f3a9737586db23"