reader/android: use the vdls included in android-lib

Change-Id: Ie50bcabfc1d03e8cf05a45f77d2e4422444cb9cc
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 42e6601..590fd3d 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -77,7 +77,6 @@
 }
 
 vdl {
-    inputPaths += System.getenv("JIRI_ROOT") + '/release/go/src'
     inputPaths += new File(projectDir, '../../common').canonicalPath
     packageTranslations += 'vdl->io.v.android.apps.reader.vdl'
 }