Do not set server.port=-1 for non embedded tests

Closes gh-16998

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/SpringBootContextLoader.java

@@ -23,10 +23,6 @@ import java.util.List;
 import org.springframework.beans.BeanUtils;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.WebApplicationType;
-import org.springframework.boot.context.properties.bind.Bindable;
-import org.springframework.boot.context.properties.bind.Binder;
-import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
-import org.springframework.boot.context.properties.source.MapConfigurationPropertySource;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.mock.web.SpringBootMockServletContext;
 import org.springframework.boot.test.util.TestPropertyValues;
@@ -166,9 +162,6 @@ public class SpringBootContextLoader extends AbstractContextLoader {
 		// JMX bean names will clash if the same bean is used in multiple contexts
 		disableJmx(properties);
 		properties.addAll(Arrays.asList(config.getPropertySourceProperties()));
-		if (!isEmbeddedWebEnvironment(config) && !hasCustomServerPort(properties)) {
-			properties.add("server.port=-1");
-		}
 		return StringUtils.toStringArray(properties);
 	}
 
@@ -176,16 +169,6 @@ public class SpringBootContextLoader extends AbstractContextLoader {
 		properties.add("spring.jmx.enabled=false");
 	}
 
-	private boolean hasCustomServerPort(List<String> properties) {
-		Binder binder = new Binder(convertToConfigurationPropertySource(properties));
-		return binder.bind("server.port", Bindable.of(String.class)).isBound();
-	}
-
-	private ConfigurationPropertySource convertToConfigurationPropertySource(List<String> properties) {
-		return new MapConfigurationPropertySource(
-				TestPropertySourceUtils.convertInlinedPropertiesToMap(StringUtils.toStringArray(properties)));
-	}
-
 	/**
 	 * Return the {@link ApplicationContextInitializer initializers} that will be applied
 	 * to the context. By default this method will adapt {@link ContextCustomizer context