minor #1447 [Twig] Removing duplication in docs (weaverryan)

This PR was squashed before being merged into the 2.x branch.

Discussion
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[Twig] Removing duplication in docs

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | None
| License       | MIT

Somehow, I think during some rewriting I did, I didn't remove old sections. This removes the duplicated sections, but keeps one piece that was new.

Cheers!

Commits
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2dcd7b3 [Twig] Removing duplication in docs

Author: weaverryan