Remove jest and jest-junit from runtime dependencies (#23276)

Summary:
Commit 06c13b3e06 pretend to update jest
to new version, but also adds jest and jest-junit to runtime dependencies
list (in addition to dev dependencies).

This commit fixes this, by removing jest and jest-junit from runtime
dependeincies.

As for motivation... story is short:
1. Updating RN 0.58.1 -> 0.58.3 I found that whole babel@6 infrastructure was returned to my `node_modules` (it is dangerous, because many tools like metro can found it and use it instead of babel@7).
2. It was because of this commit: 9d19ab0c0c that have 130 random files changed (and provides no meaning description).
But it points to: b864e7e63e (which also provides no meaning description, why it was reverted?)
And finally points to: 696bd89013, which was a "sync with master" commit. Ok. So it was from master.
3. Then I checked that jest still in runtime dependencies on master and fixed that. Also I hope this will be cherry picked into 0.58-stable.

[General] [Fixed] - Fix jest and jest-junit to be only development dependencies
Pull Request resolved: https://github.com/facebook/react-native/pull/23276

Differential Revision: D13941275

Pulled By: cpojer

fbshipit-source-id: a6f3377e670554b21f3ebd2f12d33e29d2969df1

package.json

@@ -178,8 +178,6 @@
     "graceful-fs": "^4.1.3",
     "inquirer": "^3.0.6",
     "invariant": "^2.2.4",
-    "jest": "24.0.0-alpha.6",
-    "jest-junit": "5.2.0",
     "lodash": "^4.17.5",
     "metro-babel-register": "0.51.0",
     "metro-react-native-babel-transformer": "0.51.0",