Privacy Browser: use upstream's descriptive texts

upstream uses fastlane and their texts are maintained versions of what is
in fdroiddata:
https://fdroid.gitlab.io/fdroid-website/docs/All_About_Descriptions_Graphics_and_Screenshots

metadata/com.stoutner.privacybrowser.standard.txt

@@ -10,24 +10,6 @@ Donate:https://www.stoutner.com/privacy-browser/contributors/
 Bitcoin:1Jiooc5L238VnhiWtkdYEkwm7kRNWQspSC
 
 Auto Name:Privacy Browser
-Summary:A web browser that respects your privacy
-Description:
-Privacy Browser protects your privacy by disabling JavaScript, DOM storage, and
-cookies by default, but providing quick methods to enable them for websites
-where they are required. Many websites use these technologies to track users
-between visits and across sites.
-
-Privacy Browser uses Android's built-in WebView to render web pages. As such, it
-works best if you have updated to the latest version of WebView.
-
-Warning: Privacy Browser is susceptible to
-[https://www.stoutner.com/kitkat-security-problems/ MITM (Man In The Middle)
-attacks] when browsing insecure websites from devices running Android KitKat
-(version 4.4.x, API 19).
-
-Features full screen browsing mode, integrated ad blocker, and Tor Orbot proxy
-support.
-.
 
 Repo Type:git
 Repo:git://git.stoutner.com/git/PrivacyBrowser.git
@@ -153,6 +135,12 @@ Build:2.3,23
     gradle=standard
     prebuild=sed -i -e '/firebase/d' build.gradle
 
+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:2.3