Yes, you can show or hide text you removed in the Riverside's Editor.
At the top of the transcript, click and to toggle between Show deleted parts and Hide deleted parts. This expands or minimizes the text you removed from the transcript or using Remove all silences.
When hidden, removed text is indicated by a | vertical bar. When shown, the text is
Please note that this does not show parts of the recording removed from the timeline using Split or by adjusting in- and out-points.