Don't flag published docs as experimental

They're canonical now

Author: alexcrichton

azure-pipelines.yml

@@ -287,7 +287,7 @@ jobs:
           curl -L https://github.com/rust-lang-nursery/mdBook/releases/download/v0.3.0/mdbook-v0.3.0-x86_64-unknown-linux-gnu.tar.gz | tar xzf -
           echo "##vso[task.prependpath]$PWD"
         displayName: "Install mdbook"
-      - script: (cd guide && mv _theme theme && mdbook build)
+      - script: (cd guide && mdbook build)
       - task: PublishPipelineArtifact@0
         inputs:
           artifactName: doc_book