Remove In App Messaging (#950)

Author: jraska

app/build.gradle

@@ -127,7 +127,6 @@ dependencies {
   implementation 'com.google.firebase:firebase-config'
   implementation 'com.google.firebase:firebase-crashlytics'
   implementation 'com.google.firebase:firebase-messaging'
-  implementation 'com.google.firebase:firebase-inappmessaging-display'
   implementation 'com.google.firebase:firebase-database'
 
   implementation fresco