dev-release.txt: Remove hand-written list of steps
dev-release.txt: Remove hand-written list of steps

This has gotten out of sync with the actual section outline. Now that
we have the table of contents in the left-hand pane instead of at the
top, we can just use that.

Change-Id: Iec6a42c899c77d53c445b75ac53d6a4aab097c15

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