Revert 43af788 and successors

* Patch rejected by upstream. Reverting to adopt upstream
  changes.

chrome/content/zotero/xpcom/integration.js

@@ -1221,14 +1221,6 @@ Zotero.Integration.Fields.prototype.addEditCitation = async function (field) {
 		var fields = await this.get();
 
 		var [citations, fieldToCitationIdxMapping, citationToFieldIdxMapping] = this._session.getCiteprocLists();
-		if (citations.length === 0 && !this._session.citeprocInit) {
-			await this._session.init(true, false)
-			this._session.citeprocInit = true;
-			this._session.reload = !this._session.data.prefs.delayCitationUpdates;
-			await this.updateSession(FORCE_CITATIONS_REGENERATE)
-			await this.updateDocument(FORCE_CITATIONS_REGENERATE, true, false);
-			[citations, fieldToCitationIdxMapping, citationToFieldIdxMapping] = this._session.getCiteprocLists();
-		}
 
 		for (var prevIdx = idx-1; prevIdx >= 0; prevIdx--) {
 			if (prevIdx in fieldToCitationIdxMapping) break;
@@ -1496,8 +1488,6 @@ Zotero.Integration.Session.prototype.setData = async function (data, resetStyle)
 			// We're changing the citeproc instance, so we'll have to reinsert all citations into the registry
 			this.reload = true;
 			this.styleID = data.style.styleID;
-			// To assure client/processor data reconcilitation in previewFn
-			this.citeprocInit = false;
 		} catch (e) {
 			Zotero.logError(e);
 			throw new Zotero.Exception.Alert("integration.error.invalidStyle");