Fix duplicate symbols linker error in xcodeproj (#23284)
Fix duplicate symbols linker error in xcodeproj (#23284)

Summary:
When using building React Native using the `.xcodeproj` (either via linked projects in Xcode, or precompiling React Native, which is what we do), you'll get a duplicate symbol error:

```
duplicate symbol __ZN8facebook5react10IInspectorD0Ev ...
```

And a few more.

This is because the `InspectorInterfaces.cpp` file is included in _both_ the `React` target _and_ the `jsinspector` target, and since the `jsinspector` target gets linked into the `React` target, this means the symbols from `InspectorInterfaces.cpp` end up in `libReact.a` twice.

<img width="187" alt="screen shot 2019-02-04 at 11 43 39 am" src="https://user-images.githubusercontent.com/819705/52189088-93190880-288a-11e9-8411-b44b59e8e461.png">

This PR removes `InspectorInterfaces.cpp` from the `React` target, as I believe was the original intent.

Since this bug is in the `xcodeproj` it only affects builds that use that, so CocoaPods and Buck users are unaffected.

[iOS][Fixed] - Fix potential linker issues when using xcode project
Pull Request resolved: https://github.com/facebook/react-native/pull/23284

Differential Revision: D13941777

Pulled By: cpojer

fbshipit-source-id: 8a3ffb4fc916ff6570bbff8794b4515b48055667

janicduplessis/react-native,myntra/react-native,hoangpham95/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,arthuralee/react-native,javache/react-native,hoangpham95/react-native,myntra/react-native,pandiaraj44/react-native,arthuralee/react-native,arthuralee/react-native,hammerandchisel/react-native,exponentjs/react-native,janicduplessis/react-native,hammerandchisel/react-native,hammerandchisel/react-native,exponent/react-native,exponentjs/react-native,myntra/react-native,facebook/react-native,facebook/react-native,facebook/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hammerandchisel/react-native,javache/react-native,pandiaraj44/react-native,javache/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,hammerandchisel/react-native,myntra/react-native,myntra/react-native,hammerandchisel/react-native,janicduplessis/react-native,javache/react-native,exponent/react-native,pandiaraj44/react-native,exponent/react-native,exponentjs/react-native,exponentjs/react-native,javache/react-native,exponentjs/react-native,arthuralee/react-native,hoangpham95/react-native,exponent/react-native,pandiaraj44/react-native,exponentjs/react-native,hoangpham95/react-native,exponent/react-native,javache/react-native,myntra/react-native,hammerandchisel/react-native,pandiaraj44/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,exponentjs/react-native,pandiaraj44/react-native,hoangpham95/react-native,exponent/react-native,arthuralee/react-native,facebook/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,myntra/react-native,janicduplessis/react-native,hoangpham95/react-native,exponent/react-native,pandiaraj44/react-native,myntra/react-native,myntra/react-native,exponent/react-native,exponentjs/react-native,hoangpham95/react-native,hoangpham95/react-native