chore: remove API Scan variables group (microsoft#233359) (microsoft#233553)

Co-authored-by: Raymond Zhao <[email protected]>

Author: joaomoreno

build/azure-pipelines/product-build.yml

@@ -320,8 +320,6 @@ extends:
             os: windows
           jobs:
             - job: WindowsSDL
-              variables:
-                - group: 'API Scan'
               steps:
                 - template: build/azure-pipelines/win32/sdl-scan-win32.yml@self
                   parameters:

build/azure-pipelines/win32/sdl-scan-win32.yml

@@ -161,7 +161,7 @@ steps:
     displayName: Run ApiScan
     condition: succeeded()
     env:
-      AzureServicesAuthConnectionString: $(apiscan-connectionstring)
+      AzureServicesAuthConnectionString: $(APIScanConnectionString)
       SYSTEM_ACCESSTOKEN: $(System.AccessToken)
 
   - task: PublishSecurityAnalysisLogs@3