Revert to use official Math extension #26
Description
During the 1.35 upgrade, a bug was found if a page contains both math formulas and DPL. A fix was available to the Math master branch but no backport to 1.35 yet. Hence, we forked the Math extension and cherry-picked the fix into REL1_35.
When the Math extension fix is packaged into future releases, consider to revert to use official extension by reverting the commit 2546f89