Remove Key edge flags from XML

The first key and the last of the row are automatically marked as left
and right edge key respectively.  The existence of Spacer will prevent
those automatic marking.

Bug: 5038844
Change-Id: Ie34169ceaf76e24923b8d8125eda6ecb95cf1fee
diff --git a/java/res/xml-sw600dp/kbd_symbols.xml b/java/res/xml-sw600dp/kbd_symbols.xml
index 03d37b0..fc89cd3 100644
--- a/java/res/xml-sw600dp/kbd_symbols.xml
+++ b/java/res/xml-sw600dp/kbd_symbols.xml
@@ -25,14 +25,12 @@
         latin:keyboardLayout="@xml/kbd_key_styles" />
     <include
         latin:keyboardLayout="@xml/kbd_currency_key_styles" />
-    <!-- This row is intentionally not marked as a top row -->
     <Row
         latin:keyWidth="9.0%p"
     >
         <Key
             latin:keyLabel="@string/keylabel_for_symbols_1"
-            latin:popupCharacters="@string/alternates_for_symbols_1"
-            latin:keyEdgeFlags="left" />
+            latin:popupCharacters="@string/alternates_for_symbols_1" />
         <Key
             latin:keyLabel="@string/keylabel_for_symbols_2"
             latin:popupCharacters="@string/alternates_for_symbols_2" />
@@ -63,8 +61,7 @@
         <Key
             latin:keyStyle="deleteKeyStyle"
             latin:keyXPos="-10.0%p"
-            latin:keyWidth="fillBoth"
-            latin:keyEdgeFlags="right" />
+            latin:keyWidth="fillBoth" />
     </Row>
     <Row
         latin:keyWidth="9.0%p"
@@ -97,16 +94,14 @@
         <Key
             latin:keyStyle="returnKeyStyle"
             latin:keyXPos="-14.6%p"
-            latin:keyWidth="fillBoth"
-            latin:keyEdgeFlags="right" />
+            latin:keyWidth="fillBoth" />
     </Row>
     <Row
         latin:keyWidth="8.9%p"
     >
         <Key
             latin:keyStyle="moreKeyStyle"
-            latin:keyWidth="10.0%p"
-            latin:keyEdgeFlags="left" />
+            latin:keyWidth="10.0%p" />
         <Key
             latin:keyLabel="&lt;"
             latin:popupCharacters="≤,«,‹" />
@@ -147,15 +142,13 @@
             latin:keyLabel="/"
             latin:keyWidth="fillRight" />
     </Row>
-    <!-- This row is intentionally not marked as a bottom row -->
     <Row
         latin:keyWidth="8.9%p"
     >
         <Key
             latin:keyStyle="toAlphaKeyStyle"
             latin:keyLabelOption="alignLeft"
-            latin:keyWidth="13.0%p"
-            latin:keyEdgeFlags="left" />
+            latin:keyWidth="13.0%p" />
         <Key
             latin:keyStyle="tabKeyStyle" />
         <Key