[Build] fix azure build.

Author: reegeek

azure-pipelines.yml

@@ -36,11 +36,6 @@ stages:
         displayName: '⚙️ Compile'
         dependsOn: [ Setup ]
         steps:
-          - task: Cache@2
-            inputs:
-              key: $(Agent.OS) | **/global.json, **/*.csproj
-              restoreKeys: $(Agent.OS)
-              path: ~/.nuget/packages
           - task: CmdLine@2
             inputs:
               script: './build.cmd Restore Compile --skip'
@@ -50,11 +45,6 @@ stages:
         strategy:
           parallel: 4
         steps:
-          - task: Cache@2
-            inputs:
-              key: $(Agent.OS) | **/global.json, **/*.csproj
-              restoreKeys: $(Agent.OS)
-              path: ~/.nuget/packages
           - task: CmdLine@2
             inputs:
               script: './build.cmd Test --skip --test-partition $(System.JobPositionInPhase)'
@@ -66,11 +56,6 @@ stages:
         displayName: '📦 Pack'
         dependsOn: [ Compile ]
         steps:
-          - task: Cache@2
-            inputs:
-              key: $(Agent.OS) | **/global.json, **/*.csproj
-              restoreKeys: $(Agent.OS)
-              path: ~/.nuget/packages
           - task: CmdLine@2
             inputs:
               script: './build.cmd Pack --skip'