Remove PowerShell <7.4 workaround from OneBranch (#237)

Author: andyleejordan

.pipelines/SecretManagement-Official.yml

@@ -78,10 +78,7 @@ extends:
             inputs:
               packageType: sdk
               useGlobalJson: true
-          - pwsh: |
-              Register-PSRepository -Name CFS -SourceLocation "https://pkgs.dev.azure.com/powershell/PowerShell/_packaging/powershell/nuget/v2" -InstallationPolicy Trusted
-              Install-Module -Repository CFS -Name Microsoft.PowerShell.PSResourceGet
-              ./tools/installPSResources.ps1 -PSRepository CFS
+          - pwsh: ./tools/installPSResources.ps1 -PSRepository CFS
             displayName: Install PSResources
           - pwsh: Invoke-Build -Configuration $(BuildConfiguration) -Task Build, Test
             displayName: Build

tools/installPSResources.ps1

@@ -16,7 +16,7 @@ Install-PSResource -Verbose -TrustRepository -RequiredResource  @{
     InvokeBuild = @{
         version = "5.12.1"
         repository = $PSRepository
-      }
+    }
     platyPS = @{
         version = "0.14.2"
         repository = $PSRepository