Drop dependency on native/fb (facebook#48568)

Summary:

We only need this dependency for internal builds, as we only rely on fbjni, which is its own open-source project.

This code was forked for open-source and not synced in anyway, which is a potential liability.

Changelog: [Internal]

Reviewed By: cortinico

Differential Revision: D67796633

Author: javache

packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt

@@ -122,7 +122,6 @@ add_react_common_subdir(react/timing)
 
 # ReactAndroid JNI targets
 add_react_build_subdir(generated/source/codegen/jni)
-add_react_android_subdir(src/main/jni/first-party/fb)
 add_react_android_subdir(src/main/jni/first-party/fbgloginit)
 add_react_android_subdir(src/main/jni/first-party/yogajni)
 add_react_android_subdir(src/main/jni/first-party/jni-lib-merge)