Remove unused assets

Change-Id: Iae825b3d1c62d622db8389718359eaaa2b289fb4
diff --git a/java/res/drawable/ic_subtype_keyboard.png b/java/res/drawable/ic_subtype_keyboard.png
deleted file mode 100644
index 001a38c..0000000
--- a/java/res/drawable/ic_subtype_keyboard.png
+++ /dev/null
Binary files differ
diff --git a/java/res/drawable/ic_subtype_mic.png b/java/res/drawable/ic_subtype_mic.png
deleted file mode 100644
index 03c0b69..0000000
--- a/java/res/drawable/ic_subtype_mic.png
+++ /dev/null
Binary files differ