Remove unused helper in ListManager.

Author: dlongley

lib/ListManager.js

@@ -5,7 +5,6 @@ import assert from 'assert-plus';
 import {generateLocalId} from './helpers.js';
 import {IndexAllocationCache} from './IndexAllocationCache.js';
 import {ListSource} from './ListSource.js';
-import {v4 as uuid} from 'uuid';
 
 /* Notes: The following notes explain the scaling design for assigning
    status list (SL) indexes to VCs in a parallel fashion. This design
@@ -590,47 +589,6 @@ export class ListManager {
     }
   }
 
-  async _getIndexAssignmentDoc({
-    blockAssignmentDocId, blockIndex, slSequence
-  }) {
-    // get `edvClient` directly; do not use cache in `documentStore` to ensure
-    // latest docs are used
-    const {documentStore: {edvClient}} = this;
-
-    // try to find existing index assignment doc
-    const equals = {
-      'meta.blockAssignmentDocId': blockAssignmentDocId,
-      'meta.blockIndex': blockIndex
-    };
-
-    // Note: This implementation is notably different from the
-    // `_getListManagementDoc` because when duplicate or conflict errors arise,
-    // we want to throw them, not ignore and read.
-    const {documents} = await edvClient.find({equals, limit: 1});
-    if(documents.length === 0) {
-      const type = 'StatusListIndexAssignmentDocument';
-      let indexAssignmentDoc = {
-        id: await edvClient.generateId(),
-        content: {
-          id: `urn:uuid:${uuid()}`,
-          type,
-          slSequence,
-          nextLocalIndex: 0
-        },
-        meta: {
-          type,
-          blockAssignmentDocId,
-          blockIndex
-        }
-      };
-      indexAssignmentDoc = await edvClient.update({doc: indexAssignmentDoc});
-      return {indexAssignmentDoc};
-    } else {
-      const [indexAssignmentDoc] = documents;
-      return {indexAssignmentDoc};
-    }
-  }
-
   async _init() {
     const {documentStore: {edvClient}} = this;
     edvClient.ensureIndex({