ID 481830 - Remove mentions of the C_VerticalAligner node from documentation pages.

Problem summary
Remove mentions of the C_VerticalAligner node from documentation pages.

Customer reported version
nuke.13.0v2 caravr.2.1v5

Customer reported platform
windows10

Steps to reproduce
1) Open the following links in a web browser:

- https://learn.foundry.com/cara-vr/Content/user_guide/stereo_workflows/c_verticalaligner.html
- https://learn.foundry.com/cara-vr/Content/user_guide/stereo_workflows/section_stereo.html
- https://learn.foundry.com/cara-vr/Content/user_guide/stereo_workflows/verticalaligner/align_rectilinear.html

Expected behavior
The documentation should be updated to remove any mentioning of the C_VerticalAligner node, as it is not currently available in NukeX 12 or 13.

Actual behavior
The documentation shows that the C_VerticalAligner node is available to use in NukeX 12 and 13.

Workaround
There is no available workaround at this time.

Reproduced by Support
Nuke 13.0v2 - Windows 10, macOS 10.14
Nuke 13.0v1 - Windows 10, macOS 10.14
Nuke 12.0v1 - Windows 10, macOS 10.14

Earliest version tested
Nuke 12.0v1 - This feature did not exist before this version

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