Fix: Remove duplicate windowsImage settings

Author: mjbond-msft

azure-pipelines.yml

@@ -109,7 +109,6 @@ stages:
           runChecks: false
           displayName: iOS
           publishOutputSuffix: '-ios'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -123,7 +122,6 @@ stages:
           runChecks: false
           displayName: Android API 21
           publishOutputSuffix: '-android21'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -140,7 +138,6 @@ stages:
           runChecks: false
           displayName: Android API 22
           publishOutputSuffix: '-android22'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -152,12 +149,12 @@ stages:
 
 #       - template: .ci/build.yml@components
 #         parameters:
+#           windowsImage: windows-2019
 #           name: devicetests_android_api_23
 #           runChecks: false
 #           continueOnError: true
 #           displayName: Android API 23
 #           publishOutputSuffix: '-android23'
-#           windowsImage: ''
 #           areaPath: $(AREA_PATH)
 #           verbosity: diagnostic
 #           cakeFile: DeviceTests/build.cake
@@ -174,7 +171,6 @@ stages:
           runChecks: false
           displayName: Android API 24
           publishOutputSuffix: '-android24'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -191,7 +187,6 @@ stages:
           runChecks: false
           displayName: Android API 26
           publishOutputSuffix: '-android26'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -208,7 +203,6 @@ stages:
           runChecks: false
           displayName: Android API 29
           publishOutputSuffix: '-android29'
-          windowsImage: ''
           areaPath: $(AREA_PATH)
           verbosity: diagnostic
           cakeFile: DeviceTests/build.cake
@@ -220,11 +214,11 @@ stages:
 
       # - template: .ci/build.yml@components
       #   parameters:
+      #     windowsImage: windows-2019
       #     name: devicetests_android_api_30
       #     runChecks: false
       #     displayName: Android API 30
       #     publishOutputSuffix: '-android30'
-      #     windowsImage: ''
       #     areaPath: $(AREA_PATH)
       #     verbosity: diagnostic
       #     cakeFile: DeviceTests/build.cake