Move slot UI files around (#11282)

* Move files around for themes

Resources/Textures/Interface/Inventory/Default/meta.json

@@ -1,86 +0,0 @@
-{
-  "version": 1,
-  "size": {
-      "x": 32,
-      "y": 32
-  },
-  "license": "CC-BY-NC-SA-3.0",
-  "copyright": "Taken from https://github.com/goonstation/goonstation at commit e77d85d9c1d93aa32da7702737ceeac2b56738ac.",
-  "states": [
-      {
-        "name": "back",
-      },
-      {
-        "name": "belt"
-      },
-      {
-        "name": "block"
-      },
-      {
-        "name": "ears"
-      },
-      {
-        "name": "ears_headset"
-      },
-      {
-        "name": "glasses"
-      },
-      {
-        "name": "gloves"
-      },
-      {
-        "name": "hand_active"
-      },
-      {
-        "name": "hand_active_gold"
-      },
-      {
-        "name": "hand_l"
-      },
-      {
-        "name": "hand_l_no_letter"
-      },
-      {
-        "name": "hand_r"
-      },
-      {
-        "name": "hand_r_no_letter"
-      },
-      {
-        "name": "head"
-      },
-      {
-        "name": "id"
-      },
-      {
-        "name": "invtoggle"
-      },
-      {
-        "name": "mask"
-      },
-	    {
-        "name": "neck"
-      },
-      {
-        "name": "pocket"
-      },
-      {
-        "name": "shoes"
-      },
-      {
-        "name": "suit"
-      },
-      {
-        "name": "suit_storage"
-      },
-      {
-        "name": "uniform"
-      },
-      {
-        "name": "inventory"
-      },
-      {
-        "name": "pda"
-      }
-   ]
-}

Resources/Textures/Interface/Inventory/Modernized/meta

@@ -1,68 +0,0 @@
-{
-    "version": 1,
-    "size": {
-        "x": 32,
-        "y": 32
-    },
-    "license": "CC-BY-NC-SA-3.0",
-    "copyright": "Heavily derived from https://github.com/goonstation/goonstation at commit e77d85d9c1d93aa32da7702737ceeac2b56738ac.",
-    "states": [
-        {
-            "name": "back",
-        },
-        {
-            "name": "belt"
-        },
-        {
-            "name": "block"
-        },
-        {
-            "name": "ears"
-        },
-        {
-            "name": "glasses"
-        },
-        {
-            "name": "gloves"
-        },
-        {
-            "name": "hand_l"
-        },
-        {
-            "name": "hand_l_active"
-        },
-        {
-            "name": "hand_r"
-        },
-        {
-            "name": "hand_r_active"
-        },
-        {
-            "name": "head"
-        },
-        {
-            "name": "id"
-        },
-        {
-            "name": "invtoggle"
-        },
-        {
-            "name": "mask"
-        },
-		{
-            "name": "neck"
-        },
-        {
-            "name": "pocket"
-        },
-        {
-            "name": "shoes"
-        },
-        {
-            "name": "suit"
-        },
-        {
-            "name": "uniform"
-        }
-    ]
-}