commons-app#5611 removed MapBox from CREDIS because it has already been replaced (commons-app#5617)

Author: k-rajesh

CREDITS

@@ -53,7 +53,6 @@ their contribution to the product.
 * Butterknife
 * GSON
 * Timber
-* MapBox
 
 3rd party open source apps from which significant code has been reused:
 * Android Wikipedia app https://github.com/wikimedia/apps-android-wikipedia