Remove decompression retreat

Why is this change being made?

Not planned for any of the current proposed acquisitions Need to think through if, when and what we are doing before including in handbook

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Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what