Removed redundant FastLane files

fastlane/metadata/android/en-US/changelogs/15.txt

@@ -1,4 +0,0 @@
-Added PolarView rotation using sensors data
-Added custom TLE import (file/url)
-Fixed "All/None" selection button behaviour
-Minor fixes and code cleanup

fastlane/metadata/android/en-US/changelogs/16.txt

@@ -1,5 +0,0 @@
-Fixed the "eternal refresh" bug
-Fixed TLE sources storage and addition order
-Added AMSAT TLE source as default
-Added non-txt TLE file import (.tle)
-Added ability to toggle UTC times for passes

fastlane/metadata/android/en-US/changelogs/18.txt

@@ -1,4 +0,0 @@
-Switched to software (fusion) rotation sensor
-Added magnetic declination calculation for true north
-Doppler shift calculation was added by @tekk
-Added OpenStreetMaps-based world view, work in progress...