docs(upgrade): remove outdated/non-applicable AOT section from upgrade guide (#36015)
docs(upgrade): remove outdated/non-applicable AOT section from upgrade guide (#36015)

The AOT compilation section of the `ngUpgrade` guide was
outdated/non-applicable. This commit hides the section to avoid confusion.
Fixing the section and re-introducing it is being tracked in #35989.

PR Close #36015

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