Changes imported from Abseil "staging" branch:
Changes imported from Abseil "staging" branch:

  - 586ce24e521973fceb43fd8ea7c9f54eae938762 Remove comments that reference internal code. by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 586ce24e521973fceb43fd8ea7c9f54eae938762
Change-Id: Ibab556ce20d3cb0022483cb1f027af67e26706f6

firebase/abseil-cpp,abseil/abseil-cpp,firebase/abseil-cpp,abseil/abseil-cpp,firebase/abseil-cpp,firebase/abseil-cpp,abseil/abseil-cpp,abseil/abseil-cpp