Remove goo.im mirror as it is currently down

Change-Id: I9fd5b1f25e77191d51652a6bf90f99bce0377c72
diff --git a/_data/mirrors.yml b/_data/mirrors.yml
index 8e86c21..4cda200 100644
--- a/_data/mirrors.yml
+++ b/_data/mirrors.yml
@@ -4,5 +4,3 @@
 - description: Techerrata in Germany (may be out of date)
   baseurl: http://techerrata.com/browse/twrp2/
 
-- description: Goo.im (may be out of date)
-  baseurl: https://goo.im/devs/OpenRecovery/