Fix inconsistent and incorrect Roboto Medium usage

chrome/android/java/res/values/values.xml

Index: chrome/android/java/res/values/values.xml
diff --git a/chrome/android/java/res/values/values.xml b/chrome/android/java/res/values/values.xml
index ef5aa3110bc7624d4ab9bb201c6c13a1971f55dd..8ea6bc26d699d2a8d78674f3a3e2e5923700ba89 100644
--- a/chrome/android/java/res/values/values.xml
+++ b/chrome/android/java/res/values/values.xml
@@ -8,12 +8,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:ignore="MissingTranslation">
 
-    <!-- Font to use when a spec asks for "Roboto Medium".
-         Bolding the text makes it look almost, but not quite, entirely unlike Roboto Medium,
-         which doesn't exist pre-L. -->
-    <string name="roboto_medium_typeface">sans-serif</string>
-    <integer name="roboto_medium_textstyle">1</integer>
-
     <!-- Menu Animation Constants -->
     <item type="fraction" format="fraction" name="menu_animation_pivot_x">95%</item>