remove translations of signal strength

- It makes no sense to translate either of this
- There's chance that this value won't be valid in case of not
functional ofono. which results in giant I18n argument missing error.

If translation was added to translate netreg.strength, I plan to remove
it anyway.

containments/panel/package/contents/ui/indicators/SignalStrength.qml

@@ -92,7 +92,7 @@ Item {
             left: strengthIcon.right
             verticalCenter: parent.verticalCenter
         }
-        text: i18nc("<strength of network>% <network name>", "%1% %2", netreg.strength, netreg.name)
+        text: netreg.strength + "% " + netreg.name
         color: PlasmaCore.ColorScope.textColor
         font.pixelSize: parent.height / 2
     }