Remove/rewrite references to outdated router

[denis-anisimov]

Fix for #2838

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This change is 

[SomeoneToIgnore]

Reviewed 11 of 11 files at r1.
Review status: all files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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src/main/java/com/vaadin/flow/tutorial/getstarted/ExampleTemplate.java, line 32 at r1 (raw file):

@HtmlImport("src/example-template.html")

You don't need to add it twice, don't you?

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Comments from Reviewable

[denis-anisimov]

Review status: all files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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src/main/java/com/vaadin/flow/tutorial/getstarted/ExampleTemplate.java, line 32 at r1 (raw file):

ExampleTemplate

partial copy/paste from the tutorial text
Done.

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Comments from Reviewable

[SomeoneToIgnore]

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Reviewed 1 of 1 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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src/main/java/com/vaadin/flow/tutorial/getstarted/ExampleTemplate.java, line 32 at r1 (raw file):

Previously, denis-anisimov (Denis) wrote…

ExampleTemplate

partial copy/paste from the tutorial text
Done.

Nice.

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