Remove need for custom DNS in Nextcloud install script

[remz1337]

Note

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Description

Fix in nextcloud script has been deployed, so we don't need anymore the custom DNS hack.

Tested and working on my side
nextcloud/nextcloudpi#2004
nextcloud/nextcloudpi#1926

Fixes # (issue)
#94

Type of change

Please check the relevant option(s):

• Bug fix (non-breaking change that resolves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (a fix or feature that would cause existing functionality to change unexpectedly)
• New script (a fully functional and thoroughly tested script or set of scripts.)
• Documentation update required (this change requires an update to the documentation)

Prerequisites

The following efforts must be made for the PR to be considered. Please check when completed:

• Self-review performed (I have reviewed my code, ensuring it follows established patterns and conventions)
• Testing performed (I have tested my changes, ensuring everything works as expected)

[havardthom]

Nice, good catch