remove references to maven.v.io

All of our binaries are now hosted on JCenter and Maven Central, there's
no need for maven.v.io anymore.

Change-Id: Ibf893ce0c98cbe538953a6b841620c9eac49ff1b
diff --git a/android/app/build.gradle b/android/app/build.gradle
index e7c7c88..5618fa5 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -25,9 +25,6 @@
 
 repositories {
     mavenCentral()
-    maven {
-        url 'https://maven.v.io/'
-    }
 }
 
 android {
@@ -72,7 +69,7 @@
     compile 'com.android.support:cardview-v7:22.2.1'
     compile 'com.android.support:recyclerview-v7:22.2.1'
     compile 'com.joanzapata.pdfview:android-pdfview:1.0.4@aar'
-    compile 'io.v:vanadium-android:0.1-SNAPSHOT'
+    compile 'io.v:vanadium-android:0.1'
 }
 
 vdl {