EteSync: use upstream's descriptive texts

Upstream uses fastlane and their texts is a maintained version of what is in
fdroiddata:
https://fdroid.gitlab.io/fdroid-website/docs/All_About_Descriptions_Graphics_and_Screenshots

metadata/com.etesync.syncadapter.txt

@@ -7,28 +7,6 @@ Issue Tracker:https://github.com/etesync/android/issues
 Changelog:https://github.com/etesync/android/blob/HEAD/ChangeLog.md
 
 Auto Name:EteSync
-Summary:Synchronize contacts and calendars securely
-Description:
-Secure, End-to-End encrypted and journalized personal information
-synchronization for Android. Currently only contacts and calendars, with more on
-the way.
-
-In order to use this application you need to have an account with EteSync. Check
-out [https://www.etesync.com/] for more information. The server code is
-available at [https://github.com/etesync/journal-manager].
-
-'''Easy to Use:''' EteSync is very easy to use. It seamlessly integrates with
-Android so you won't even notice you are using it. Security doesn't always have
-to come at a cost.
-
-'''Secure & Open:''' Thanks to End-to-End encryption, not even we can see your
-data. Don't believe us? You shouldn't, just verify yourself, the client is open
-source.
-
-'''Full History:''' A full history of your data is saved in an integrity-checked
-journal which means no one can modify or truncate information without your
-knowledge.
-.
 
 Repo Type:git
 Repo:https://github.com/etesync/android
@@ -119,6 +97,12 @@ Build:0.18.1,16
     submodules=yes
     gradle=yes
 
+Maintainer Notes:
+Summary and Description are maintained by upstream using fastlane in
+the source repo:
+https://f-droid.org/docs/All_About_Descriptions_Graphics_and_Screenshots
+.
+
 Auto Update Mode:Version v%v
 Update Check Mode:Tags
 Current Version:0.18.1