Remove obsolete version entries

Removed deprecated versions from the versions.json file.

Author: tzolov

versions.json

@@ -6,11 +6,6 @@
       "latest-snapshot"
     ]
   },
-  {
-    "version": "1.0.0-SNAPSHOT",
-    "title": "1.0.0-SNAPSHOT",
-    "aliases": []
-  },
   {
     "version": "1.0.0",
     "title": "1.0.0",
@@ -23,11 +18,6 @@
     "title": "0.18.1-SNAPSHOT",
     "aliases": []
   },
-  {
-    "version": "v1.0.0-RC3",
-    "title": "v1.0.0-RC3",
-    "aliases": []
-  },
   {
     "version": "v0.18.1",
     "title": "v0.18.1",