Cleanup RN instrumentation_tests BUCK-file

Reviewed By: bestander

Differential Revision: D4440069

fbshipit-source-id: 058e935ae60c4e71f033532e2942053633f9a662

ReactAndroid/src/androidTest/java/com/facebook/react/tests/BUCK

@@ -1,10 +1,5 @@
 include_defs('//ReactAndroid/DEFS')
 
-# Tests that are too flaky to run on SandCastle
-# TODO t11057216 stabilise them
-SANDCASTLE_FLAKY = [
-]
-
 deps = [
   react_native_dep('third-party/android/support/v4:lib-support-v4'),
   react_native_dep('third-party/java/jsr-305:jsr-305'),
@@ -40,12 +35,3 @@ android_library(
     'PUBLIC',
   ],
 )
-
-android_library(
-  name = 'stable-tests',
-  srcs = glob(['**/*.java'], excludes=SANDCASTLE_FLAKY),
-  deps = deps,
-  visibility = [
-    'PUBLIC',
-  ],
-)