The tag has been <mw:editsection> since at least 2011
(f0fd318a4e), we no longer need to
include the ancient <editsection> variant in our regexp and
test cases.
Change-Id: I5fd783556810ea13b07a69066ea6762d1a1863e1
Before 1.39 we used <mw:toc> and in 1.39 we switched to <mw:tocplace/>
(commit 24949480eb). This was changed
to a <meta> tag in 1.40 (commit
0b10563895 and
fa8646ca7b) and the old content has long
since expired from the ParserCache. Clean up the old ParserCache
transition code.
Change-Id: I3254d0acba31e107b50767797a2b0ad28aba59ee
Split out from the I44045b3b9e78e change.
This is consistent with what Parsoid will use for the TOC marker.
Bug: T287767
Bug: T270199
Bug: T311502
Depends-On: I1f607cf1ef1b61fb4d2e1880de756fb94d5a6b22
Change-Id: Ie63eed07b9bca1bfa07d4c256aba3728cedd8f93
