message: Unpin psutil as v5.6.7 no longer shows the 'egg_base' issue.
diff: @@ -89,9 +89,8 @@ pip2 install pandas==0.19.2
  pip3 install pandas==0.19.2
  # Benchmark tests require the following:
  -# 5.6.4 fails to pip2 install. TODO(b/143872855): remove pinning once fixed.
  -pip2 install psutil==5.6.3
  -pip3 install psutil==5.6.3
  +pip2 install psutil
  +pip3 install psutil
  pip2 install py-cpuinfo
  pip3 install py-cpuinfo
  