Remove references to Scrutinizer

This whole setup seems to have been broken for some five years now (at
least that’s how old the “current” results are). I’m not sure how much
it was used before then – I don’t remember looking at these results very
often (but that might have been a personal preference thing). Note that
Wikibase also has some test coverage reporting in Wikimedia CI again
these days, courtesy of T288396.

Bug: T391437
Change-Id: I149d3011e9c3c9a83f43fbbb12a2a4c826611b4f

Author: lucaswerkmeister

.gitattributes

@@ -1,7 +1,6 @@
 .gitattributes export-ignore
 .github/ export-ignore
 .gitignore export-ignore
-.scrutinizer.yml export-ignore
 composer.json export-ignore
 phpunit.xml.dist export-ignore
 tests export-ignore

.github/workflows/scrutinize.yaml

@@ -1,8 +1,6 @@
 # Wikibase DataModel Serialization
 
 [![Build Status](https://github.com/wmde/WikibaseDataModelSerialization/actions/workflows/lint-and-test.yaml/badge.svg?branch=master)](https://github.com/wmde/WikibaseDataModelSerialization/actions/workflows/lint-and-test.yaml)
-[![Scrutinizer Quality Score](https://scrutinizer-ci.com/g/wmde/WikibaseDataModelSerialization/badges/quality-score.png?s=d56b9477c29f4799b3834c4fbcc3731687feae95)](https://scrutinizer-ci.com/g/wmde/WikibaseDataModelSerialization/)
-[![Code Coverage](https://scrutinizer-ci.com/g/wmde/WikibaseDataModelSerialization/badges/coverage.png?s=916d21028b031abe2e685192ccef46c6f47ba76a)](https://scrutinizer-ci.com/g/wmde/WikibaseDataModelSerialization/)
 [![Download count](https://poser.pugx.org/wikibase/data-model-serialization/d/total.png)](https://packagist.org/packages/wikibase/data-model-serialization)
 [![License](https://poser.pugx.org/wikibase/data-model-serialization/license.svg)](https://packagist.org/packages/wikibase/data-model-serialization)
 
@@ -122,10 +120,9 @@ and by [Jeroen De Dauw](https://www.EntropyWins.wtf) as
 ## Links
 
 * [Wikibase DataModel Serialization on Packagist](https://packagist.org/packages/wikibase/data-model-serialization)
-* [Wikibase DataModel Serialization on ScrutinizerCI](https://scrutinizer-ci.com/g/wmde/WikibaseDataModelSerialization/)
 * [Wikibase DataModel Serialization on OpenHub](https://www.openhub.net/p/WikibaseDataModelSerialization)
 
-## See also 
+## See also
 
 * [Wikibase DataModel](https://github.com/wmde/WikibaseDataModel)
 * [Wikibase Internal Serialization](https://github.com/wmde/WikibaseInternalSerialization) (For the "internal" serialization format)