Remove simg2img from user_tags.mk

Change-Id: Ibc0d6cacd25b343424cecce63fb1cd9c6d714f92
Signed-off-by: Scott Anderson <saa@android.com>
diff --git a/core/user_tags.mk b/core/user_tags.mk
index d5aa24d..9a2c199 100644
--- a/core/user_tags.mk
+++ b/core/user_tags.mk
@@ -470,7 +470,6 @@
 	sig-create \
 	signapk \
 	signature-tools \
-	simg2img \
 	spec-progress \
 	sqlite3 \
 	stack_dump \