Fixed small typos (#2933)

esu23 created 

* Fixed typo when removing OTR

There are two encrypt methods avaliable now

* Deleting a repeated resource

Change summary

README.md                     | 2 +-
src/main/res/values/about.xml | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)

Detailed changes

README.md 🔗 

@@ -288,7 +288,7 @@ I am available for hire. Contact me via XMPP: `inputmice@siacs.eu`
 
 ### Security
 
-#### Why are there three end-to-end encryption methods and which one should I choose?
+#### Why are there two end-to-end encryption methods and which one should I choose?
 
 * OMEMO works even when a contact is offline, and works with multiple devices. It also allows asynchronous file-transfer when the server has [HTTP File Upload](http://xmpp.org/extensions/xep-0363.html). However, OMEMO not widely support and is currently implemented only implemented [by a handful of clients](https://omemo.top).
 * OpenPGP (XEP-0027) is a very old encryption method that has some advantages over OMEMO but should only be used by people who what they are doing.

src/main/res/values/about.xml 🔗 

@@ -51,7 +51,6 @@
 			\n\nhttps://github.com/rtreffer/minidns\n(WTFPL)
 			\n\nhttps://github.com/open-keychain/openkeychain-api-lib\n(Apache License, Version 2.0)
 			\n\nhttps://developer.android.com/tools/support-library\n(Apache License, Version 2.0)
-			\n\nhttps://github.com/zxing/zxing\n(Apache License, Version 2.0)
 			\n\nhttps://github.com/google/material-design-icons\n(CC BY 4.0)
 			\n\nhttps://github.com/timroes/EnhancedListView\n(Apache License, Version 2.0)
 			\n\nhttps://github.com/leolin310148/ShortcutBadger\n(Apache License, Version 2.0)
@@ -60,4 +59,4 @@
 			\n\nhttps://github.com/jdamcd/android-crop\n(Apache License, Version 2.0)
 			\n\nhttps://github.com/zxing/zxing\n(Apache License, Version 2.0)
 	</string>
-</resources>
+</resources>