The Service Connection Points (SCPs) you're seeing under the computer objects are created automatically by Hyper-V when virtual machines are joined to Active Directory. These SCPs are used to register services, such as virtual machine management services, within AD.
Regarding deleting these SCPs, using the "Use Delete Subtree server control" option should be safe, especially since you're confident that the SCPs are not needed and are the only sub-objects under the computer objects.
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hth
Marcin