Fix Break in Perf Public Script (#543)

scripts/publish-performance-results.ps1

@@ -3,8 +3,6 @@ $PSDefaultParameterValues['*:ErrorAction'] = 'Stop'
 
 # Root directory of the project.
 $RootDir = Split-Path $PSScriptRoot -Parent
-$RootDir = Split-Path $RootDir -Parent
-
 $ResultsPath = Join-Path $RootDir "artifacts/PerfDataResults"
 
 # Enumerate files