Revert brand-related preset changes

I'm not convinced we shouldn't be encouraging simply tagging
`name=McDonald's`, `name=Shell`, etc., without `brand` or
`operator` at all.

data/presets/fields.json

@@ -212,24 +212,6 @@
         "type": "combo",
         "label": "Type"
     },
-    "brand_fast_food": {
-        "key": "brand",
-        "type": "text",
-        "placeholder": "McDonald's, Subway, KFC...",
-        "label": "Brand"
-    },
-    "brand_fuel": {
-        "key": "brand",
-        "type": "text",
-        "placeholder": "Shell, Exxon, BP...",
-        "label": "Brand"
-    },
-    "brand_restaurant": {
-        "key": "brand",
-        "type": "text",
-        "placeholder": "Olive Garden, Applebee's, TGI Friday's...",
-        "label": "Brand"
-    },
     "building": {
         "key": "building",
         "type": "typeCombo",