refactor: remove PR pipeline (#540)

Remove pr pipeline

Author: vbreuss

.github/workflows/pr.yml

@@ -60,7 +60,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "workflows", "workflows", "{
 	ProjectSection(SolutionItems) = preProject
 		.github\workflows\build.yml = .github\workflows\build.yml
 		.github\workflows\ci.yml = .github\workflows\ci.yml
-		.github\workflows\pr.yml = .github\workflows\pr.yml
 		.github\workflows\test-report.yml = .github\workflows\test-report.yml
 	EndProjectSection
 EndProject