[MacPorts] Batch modify: #51356, #67049, #69261, #71269

[MacPorts]

Batch modification to #51356, #67049, #69261, #71269 by raimue:


Action: reassign

Comment:
Dropping maintainership of valgrind.

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Tickets URL: <https://trac.macports.org/query?id=51356%2C67049%2C69261%2C71269>
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