Do not refer to $npmTag which does not exist (#16075)

`--access` is not required either since we now specify that in the package.json file

build/azure-pipelines.yml

@@ -768,7 +768,7 @@ stages:
 
               # Find the first .tgz file in the current directory and publish it
               files=( ./*.tgz )
-              npm publish --access public "${files[0]}"
+              npm publish "${files[0]}"
             displayName: Push to npm (MyGet)
             workingDirectory: $(Pipeline.Workspace)/npm
 
@@ -822,7 +822,7 @@ stages:
 
               # Find the first .tgz file in the current directory and publish it
               files=( ./*.tgz )
-              npm publish --tag $npmTag --access public "${files[0]}"
+              npm publish "${files[0]}"
             displayName: Push to npm
             workingDirectory: $(Pipeline.Workspace)/npm