remove flag for edits as it's not handled separately anymore

src/client.js

@@ -153,11 +153,6 @@ function keyFromRecoverySession(session, decryptionKey) {
  * via `EventTimelineSet#getRelationsForEvent`.
  * This feature is currently unstable and the API may change without notice.
  *
- * @param {boolean} [opts.unstableClientRelationReplacements = false]
- * Optional. Set to true to enable client-side handling of m.replace event relations,
- * exposed through the `Room.replaceEvent` event.
- * This feature is currently unstable and the API may change without notice.
- *
  * @param {Array} [opts.verificationMethods] Optional. The verification method
  * that the application can handle.  Each element should be an item from {@link
  * module:crypto~verificationMethods verificationMethods}, or a class that
@@ -224,7 +219,6 @@ function MatrixClient(opts) {
     this.urlPreviewCache = {};
     this._notifTimelineSet = null;
     this.unstableClientRelationAggregation = !!opts.unstableClientRelationAggregation;
-    this.unstableClientRelationReplacements = !!opts.unstableClientRelationReplacements;
 
     this._crypto = null;
     this._cryptoStore = opts.cryptoStore;

src/models/room.js

@@ -99,11 +99,6 @@ function synthesizeReceipt(userId, event, receiptType) {
  * via `EventTimelineSet#getRelationsForEvent`.
  * This feature is currently unstable and the API may change without notice.
  *
- * @param {boolean} [opts.unstableClientRelationReplacements = false]
- * Optional. Set to true to enable client-side handling of m.replace event relations,
- * exposed through the `Room.replaceEvent` event.
- * This feature is currently unstable and the API may change without notice.
- *
  * @prop {string} roomId The ID of this room.
  * @prop {string} name The human-readable display name for this room.
  * @prop {Array<MatrixEvent>} timeline The live event timeline for this room,

src/sync.js

@@ -119,14 +119,12 @@ SyncApi.prototype.createRoom = function(roomId) {
     const {
         timelineSupport,
         unstableClientRelationAggregation,
-        unstableClientRelationReplacements,
     } = client;
     const room = new Room(roomId, client, client.getUserId(), {
         lazyLoadMembers: this.opts.lazyLoadMembers,
         pendingEventOrdering: this.opts.pendingEventOrdering,
         timelineSupport,
         unstableClientRelationAggregation,
-        unstableClientRelationReplacements,
     });
     client.reEmitter.reEmit(room, ["Room.name", "Room.timeline", "Room.redaction",
                           "Room.receipt", "Room.tags",