Remove symbols shifted layout related code

This is a follow up of I7fe6520e4e.

Bug: 9059539
Change-Id: Idb39906ddb1e2234a0d1c7c4d5e6fc728090e79e
diff --git a/java/res/xml/rowkeys_pcqwerty2.xml b/java/res/xml/rowkeys_pcqwerty2.xml
index cedf475..2dfb653 100644
--- a/java/res/xml/rowkeys_pcqwerty2.xml
+++ b/java/res/xml/rowkeys_pcqwerty2.xml
@@ -23,7 +23,7 @@
 >
     <switch>
         <case
-            latin:keyboardLayoutSetElement="symbols|symbolsShifted"
+            latin:keyboardLayoutSetElement="symbols"
         >
             <include
                 latin:keyboardLayout="@xml/keys_pcqwerty_symbols2" />