Remove unneeded legacy API test

Author: atextor

core/esmf-aspect-model-document-generators/src/test/java/org/eclipse/esmf/aspectmodel/generator/diagram/AspectModelDiagramGeneratorTest.java

@@ -17,16 +17,13 @@
 import static org.assertj.core.api.Assertions.assertThatCode;
 
 import java.io.IOException;
-import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
-import java.util.function.Function;
 
 import org.eclipse.esmf.metamodel.Aspect;
 import org.eclipse.esmf.metamodel.AspectModel;
 import org.eclipse.esmf.test.TestAspect;
 import org.eclipse.esmf.test.TestResources;
 
-import org.apache.commons.io.output.NullOutputStream;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.EnumSource;
@@ -64,26 +61,10 @@ void generateDiagramsShouldReturnUtf8StringRegardlessOfPlatformEncoding( final S
    }
 
    @Test
-   void testGenerateDiagramsInMultipleLanguages() throws IOException {
+   void testGenerateDiagramsInMultipleLanguages() {
       final AspectModel aspectModel = TestResources.load( TestAspect.ASPECT_WITH_ENGLISH_AND_GERMAN_DESCRIPTION );
       final AspectModelDiagramGenerator generator = new AspectModelDiagramGenerator(
             aspectModel.aspect(), DiagramGenerationConfigBuilder.builder().format( DiagramGenerationConfig.Format.SVG ).build() );
       assertThat( generator.generate().toList() ).size().isEqualTo( 2 );
-
-      // Test legacy API
-      final AspectModelDiagramGenerator generator2 = new AspectModelDiagramGenerator( aspectModel.aspect() );
-      class GenerationFunction implements Function<String, OutputStream> {
-         int count = 0;
-
-         @Override
-         public OutputStream apply( final String name ) {
-            count++;
-            return NullOutputStream.INSTANCE;
-         }
-      }
-
-      final GenerationFunction nameMapper = new GenerationFunction();
-      generator2.generateDiagrams( AspectModelDiagramGenerator.Format.SVG, nameMapper );
-      assertThat( nameMapper.count ).isEqualTo( 2 );
    }
 }