Remove Groovy Nature from Eclipse projects

This commit removes the Groovy Nature from Eclipse projects, since we do
not want to require that the Groovy plugin is installed in order for
developers to work with the code base in Eclipse IDE.

Author: sbrannen

junit-vintage-engine/junit-vintage-engine.gradle.kts

@@ -103,4 +103,9 @@ eclipse {
 		// Avoid exposing test resources to dependent projects
 		containsTestFixtures = false
 	}
+	project {
+		// Remove Groovy Nature, since we don't require a Groovy plugin for Eclipse
+		// in order for developers to work with the code base.
+		natures.removeAll { it == "org.eclipse.jdt.groovy.core.groovyNature" }
+	}
 }

jupiter-tests/jupiter-tests.gradle.kts

@@ -55,4 +55,9 @@ eclipse {
 			}
 		}
 	}
+	project {
+		// Remove Groovy Nature, since we don't require a Groovy plugin for Eclipse
+		// in order for developers to work with the code base.
+		natures.removeAll { it == "org.eclipse.jdt.groovy.core.groovyNature" }
+	}
 }