remove untranslatable strings from zh and pt translations

Author: jlucidar

app/src/main/res/values-pt/strings.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name" translatable="false">DigiView</string>
     <string name="digiview_feed">DigiView\nfeed</string>
     <string name="waiting_for_usb_device">Aguardando pelo dispositivo USB…</string>
     <string name="usb_device_approved">Dispositivo USB aprovado</string>

app/src/main/res/values-zh/strings.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name" translatable="false">DigiView</string>
     <string name="digiview_feed">DigiView\nfeed</string>
     <string name="waiting_for_usb_device">等待USB设备…</string>
     <string name="usb_device_approved">USB设备已批准</string>