Revert "Replace offset with walk delay for fetching latest log timestamp"
Revert "Replace offset with walk delay for fetching latest log timestamp"

This reverts commit 96112576c761cbfac8f3d2eda4ae94d7c3495b4e.

[#172322729](https://www.pivotaltracker.com/story/show/172322729)

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli