[search-index] Don't removeQuotedHTML when indexing threads

Summary:
This is a very expensive operation and there seemed to be few downsides
to including quoted portions in the index. We can revisit this to
improve how we index when we have a proper scheduler.

Test Plan: Run locally

Reviewers: juan, evan

Reviewed By: evan

Differential Revision: https://phab.nylas.com/D3682

internal_packages/search-index/lib/thread-search-index-store.es6

@@ -205,11 +205,7 @@ class ThreadSearchIndexStore {
       thread.messages()
       .then((messages) => (
         messages
-        .map(({body, snippet}) => (
-          !_.isString(body) ?
-            {snippet} :
-            {body: QuotedHTMLTransformer.removeQuotedHTML(body)}
-        ))
+        .map(({body, snippet}) => (!_.isString(body) ? {snippet} : {body}))
         .map(({body, snippet}) => (
           snippet || Utils.extractTextFromHtml(body, {maxLength: MESSAGE_BODY_LENGTH}).replace(/(\s)+/g, ' ')
         ))