chore: remove deprecated uk.ewancroft.now lexicon

static/lexicons/uk/ewancroft/now.json

···
-{
-    "lexicon": 1,
-    "$type": "com.atproto.lexicon.schema",
-    "id": "uk.ewancroft.now",
-    "description": "A status lexicon, made for short messages in plain text for display on profiles.",
-    "defs": {
-      "main": {
-        "type": "record",
-        "key": "tid",
-        "record": {
-          "type": "object",
-          "required": ["text", "createdAt"],
-          "properties": {
-            "text": {
-              "type": "string",
-              "description": "The status text formatted as plain text.",
-              "minLength": 1,
-              "maxLength": 64
-            },
-            "createdAt": {
-              "type": "string",
-              "format": "datetime",
-              "description": "The ISO 8601 date and time when the status was created."
-            }
-          }
-        }
-      }
-    }
-  }
-