Drop node-engine's optional verb pull-waits: no record gives the seat that verb

The lead's ruling (14:2x): the pull waits ENG-9 shows are carried in the engine's have, read through node_haves, as
ENG-9 allows, so the seat serves no verb of its own for them. Regenerated; seatgen -check finds nothing out of step.

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

seats/node-engine/seat.json

@@ -634,72 +634,6 @@
         ]
       }
     },
-    {
-      "name": "pull-waits",
-      "optional": true,
-      "description": "The failed pulls this machine's engine waits on a store's holder for (design 51 *What a pull meets in the swap*): per module, the image, the seat it came through and that seat's holder, when the pull began, how many settled events of that holder it heard and the last, and its last retry and what started it. Read-only. Answered by this machine's engine alone.",
-      "input": {
-        "type": "object",
-        "properties": {}
-      },
-      "answer": {
-        "type": "object",
-        "required": [
-          "waits"
-        ],
-        "properties": {
-          "waits": {
-            "type": "array",
-            "description": "every failed pull waiting on a holder",
-            "items": {
-              "type": "object",
-              "required": [
-                "module",
-                "image"
-              ],
-              "properties": {
-                "module": {
-                  "type": "string",
-                  "description": "the module whose apply failed"
-                },
-                "image": {
-                  "type": "string",
-                  "description": "the image whose pull failed"
-                },
-                "seat": {
-                  "type": "string",
-                  "description": "the seat the image came through"
-                },
-                "holder": {
-                  "type": "string",
-                  "description": "that seat's holder, whose settled the retry waits on"
-                },
-                "pull-began": {
-                  "type": "string",
-                  "description": "when the failed pull began, RFC 3339"
-                },
-                "settled-count": {
-                  "type": "integer",
-                  "description": "the settled events of the holder heard since the engine started"
-                },
-                "settled-last": {
-                  "type": "string",
-                  "description": "when the last was heard, RFC 3339"
-                },
-                "retry-last": {
-                  "type": "string",
-                  "description": "when it was last tried again, RFC 3339"
-                },
-                "retry-trigger": {
-                  "type": "string",
-                  "description": "what started that retry: settled, or the engine's start"
-                }
-              }
-            }
-          }
-        }
-      }
-    },
     {
       "name": "manifest-reads",
       "optional": true,