Remove unneeded main_hub_text variant needle

This somehow snuck in (in the wrong directory) with the ppc64
merges, but it's not needed. I've verified with the admin tab
for checking on needle use; this needle has never been matched,
and all the ppc64 text install tests match the non-variant
needle just fine. So I'm removing this unneeded variant.

needles/anaconda_main_hub_text-20161209.json

@@ -1,36 +0,0 @@
-{
-  "tags": [
-    "anaconda_main_hub_text"
-  ],
-  "area": [
-    {
-      "xpos": 2,
-      "height": 10,
-      "width": 304,
-      "ypos": 562,
-      "type": "match"
-    },
-    {
-      "type": "match",
-      "ypos": 322,
-      "width": 127,
-      "xpos": 55,
-      "height": 13
-    },
-    {
-      "ypos": 417,
-      "width": 119,
-      "type": "match",
-      "xpos": 8,
-      "height": 13
-    },
-    {
-      "xpos": 584,
-      "ypos": 338,
-      "width": 10,
-      "height": 10,
-      "type": "match"
-    }
-  ],
-  "properties": []
-}