We have a strange problem, when creating new page using this
It creates automatically navigation link, that you can´t remove
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Try below steps:
Navigation under Look and Feel section.
Here you will see to option at the very start
Global Navigation(which will be shown at the top of page) and
Current Navigation(shown at left side of the page).
Under each option you will
Structural Navigation under which there is an option to show the pages on navigation as
Show Pages checkbox from where you want to hide this links. Either from Global navigation or Current navigation.