Remove .hgtags.
diff --git a/.hgtags b/.hgtags
deleted file mode 100644
index 125d9b7..0000000
--- a/.hgtags
+++ /dev/null
@@ -1 +0,0 @@
-0b0321e26f56a7abee2ec3e02f9f351c0574e0f8 rtag