clean(demo): Remove obsolete demos pages

[jolevesq]

Closes #2618

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #2618

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Hosted November 17th 9am

https://jolevesq.github.io/geoview/

• no more type of layers demo. Everything is in the demo navigator

Checklist:

• I have build (rush build) and deploy (rush host) my PR
• I have connected the issues(s) to this PR
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have created new issue(s) related to the outcome of this PR is needed
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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This change is 

[jolevesq]

Reviewed 49 of 49 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @DamonU2)

[jolevesq]

Reviewed 2 of 5 files at r2, 3 of 3 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @DamonU2)

[DamonU2]

Reviewed 44 of 49 files at r1, 2 of 5 files at r2, 3 of 3 files at r3, all commit messages.
Reviewable status: all files reviewed, 3 unresolved discussions

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packages/geoview-core/public/templates/demos-navigator.html line 152 at r3 (raw file):

          <option value="./configs/navigator/28-geocore.json">Layer GeoView - GeoCore -</option>
          <option value="./configs/navigator/27-geocore-custom.json">Layer GeoView - GeoCore Custom Config -</option>
          <option value="./configs/navigator/29-geopackages.json">Layer GeoView - GeoPackages -</option>

Why add "GeoView" to just these?

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packages/geoview-core/public/templates/pygeoapi-processes.html line 121 at r3 (raw file):

  <script src="codedoc.js"></script>
  <script>
    // // initialize cgpv and api events, a callback is optional, used if calling api's after the rendering is ready

"//" doubled up

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packages/geoview-core/public/configs/navigator/16-esri-dynamic.json line 15 at r3 (raw file):

      {
        "geoviewLayerId": "472ef86d-7f7c-423b-a7d2-b6f92b79fd6d",
        "geoviewLayerType": "geoCore"

Not related to your PR, but we should move this layer to the bottom as it covers all the other layers