revert changes to manifest due to sync not succeeding

manifest.json

@@ -1,14 +1,5 @@
 {
   "extensions": {
-    "cloudcasa": {
-      "repo": "catalogicsoftware/cloudcasa-rancher-extension",
-      "branch": "gh-pages",
-      "versions": [
-        "0.4.0",
-        "0.4.1",
-        "1.0.0"
-      ]
-    },
     "kamaji": {
       "repo": "clastix/rancher-extension-clastix",
       "branch": "gh-pages",