Remove redundant default parameters

azure-pipelines.rx.yml

@@ -35,7 +35,6 @@ jobs:
     inputs:
       version: '3.0.100-preview7-012821'
       includePreviewVersions: true
-      performMultiLevelLookup: true
 
   - task: DotNetCoreCLI@2
     inputs:
@@ -140,8 +139,7 @@ jobs:
 
   - task: UseDotNet@2
     inputs:
-      version: '2.2.x'      
-      performMultiLevelLookup: true
+      version: '2.2.x'
 
   - task: DotNetCoreCLI@2
     inputs:
@@ -215,7 +213,6 @@ jobs:
     inputs:
       version: '3.0.100-preview7-012821'
       includePreviewVersions: true
-      performMultiLevelLookup: true
 
   - task: DotNetCoreCLI@2
     inputs: