Revert "use PerformanceObserver in node's perf-util"
Revert "use PerformanceObserver in node's perf-util"

This reverts commit 05c4659e0967106a397a1f1538008aa5179c599f.

Microsoft/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode