Remove incorrect "template" information

[Felonious-Spellfire]

What does this PR do?

Removes incorrect information from documentation about creating apps and components from templates.

Does your PR introduce any breaking changes? If yes, please list them.

None

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cc @borda @rohitgr7

[manskx]

Removes incorrect information from documentation about creating apps and components from templates.

@Felonious-Spellfire why this is "incorrect information" ?

[Felonious-Spellfire]

Removes incorrect information from documentation about creating apps and components from templates.

@Felonious-Spellfire why this is "incorrect information" ?

This came up in a Slack conversation. I was told to remove the content because it was incorrect and that users should use Lightning Apps as templates