Revert "Add autoGenerateFromAlphabet enum to KeyboardSet.Element.elementKeyboard"

This reverts commit b5b92f9b78295366c12b25d1b464a371401c3677

Bug: 5908440
diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 0ae7fa2..57930c6 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -345,21 +345,20 @@
     <declare-styleable name="KeyboardSet_Element">
         <!-- This should be aligned with KeyboardId.ELEMENT_* -->
         <attr name="elementName" format="enum">
-            <enum name="alphabet" value="0" />
-            <enum name="alphabetManualShifted" value="1" />
-            <enum name="alphabetAutomaticShifted" value="2" />
-            <enum name="alphabetShiftLocked" value="3" />
-            <enum name="alphabetShiftLockShifted" value="4" />
-            <enum name="symbols" value="5" />
-            <enum name="symbolsShifted" value="6"  />
-            <enum name="phone" value="7"  />
-            <enum name="phoneShifted" value="8"  />
-            <enum name="number" value="9"  />
+          <enum name="alphabet" value="0" />
+          <!--  TODO: Implement alphabet variant shift keyboards
+          <enum name="alphabetManualTemporaryShift" value="1" />
+          <enum name="alphabetAutomaticTemporaryShift" value="2" />
+          <enum name="alphabetShiftLock" value="3" />
+          <enum name="alphabetShiftLockShift" value="4" />
+          -->
+          <enum name="symbols" value="5" />
+          <enum name="symbolsShift" value="6"  />
+          <enum name="phone" value="7"  />
+          <enum name="phoneShift" value="8"  />
+          <enum name="number" value="9"  />
         </attr>
-        <attr name="elementKeyboard" format="reference|enum">
-            <!-- This should be aligned with KeyboardSet.ELEMENT_KEYBOARD_* -->
-            <enum name="autoGenerateFromAlphabet" value="1"/>
-        </attr>
+        <attr name="elementKeyboard" format="reference" />
         <!-- TODO: Add setShifted and setShiftLocked attribute. -->
     </declare-styleable>
 </resources>