Revert "Support Emoji keyboard"

This reverts commit d7791a93b0dee268a9e97f06fe5abcf6082e0ed1.

Change-Id: I5ca4c0227f97540e8a22b487b5056dfa3611082b
diff --git a/java/res/values/themes-common.xml b/java/res/values/themes-common.xml
index 8e9cfc9..473a125 100644
--- a/java/res/values/themes-common.xml
+++ b/java/res/values/themes-common.xml
@@ -104,14 +104,7 @@
     <style
         name="MainKeyboardView"
         parent="KeyboardView" />
-    <!-- Though {@link EmojiKeyboardView} doesn't extend {@link KeyboardView}, some views inside it,
-         for instance delete button, need themed {@link KeyboardView} attributes. -->
-    <style
-        name="EmojiKeyboardView"
-        parent="KeyboardView"
-    >
-        <item name="emojiTabLabelColor">@color/emoji_tab_label_color_ics</item>
-    </style>
+    <style name="EmojiKeyboardView" />
     <style name="MoreKeysKeyboard" />
     <style
         name="MoreKeysKeyboardView"