remove TLS 1.1 support for kitkat

app/src/main/java/org/schabi/newpipe/DownloaderImpl.java

@@ -175,7 +175,7 @@ public Response execute(@NonNull Request request) throws IOException, ReCaptchaE
     }
 
     /**
-     * Enable TLS 1.2 and 1.1 on Android Kitkat. This function is mostly taken from the documentation of
+     * Enable TLS 1.2 on Android Kitkat. This function is mostly taken from the documentation of
      * OkHttpClient.Builder.sslSocketFactory(_,_)
      * <p>
      * If there is an error, the function will safely fall back to doing nothing and printing the error to the console.

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -109,7 +109,7 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
 
-        // enable TLS1.1/1.2 for kitkat devices, to fix download and play for mediaCCC sources
+        // enable TLS1.2 for kitkat devices, to fix download and play for mediaCCC sources and peertube instances.
         if (Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
             TLSSocketFactoryCompat.setAsDefault();
         }

app/src/main/java/org/schabi/newpipe/util/TLSSocketFactoryCompat.java

@@ -17,8 +17,8 @@
 
 
 /**
- * This is an extension of the SSLSocketFactory which enables TLS 1.2 and 1.1.
- * Created for usage on Android 4.1-4.4 devices, which haven't enabled those by default.
+ * This is an extension of the SSLSocketFactory which enables TLS 1.2.
+ * Created for usage on Android 4.1-4.4 devices, which do not have it enabled by default.
  */
 public class TLSSocketFactoryCompat extends SSLSocketFactory {
 
@@ -97,8 +97,8 @@ public Socket createSocket(InetAddress address, int port, InetAddress localAddre
 
     private Socket enableTLSOnSocket(Socket socket) {
         if (socket != null && (socket instanceof SSLSocket)) {
-            ((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1.1", "TLSv1.2"});
+            ((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1.2"});
         }
         return socket;
     }
-}
+}