Revert AutoConfigurations.of() change

See https://github.com/spring-projects/spring-boot/pull/46505/files#r2224467888

Signed-off-by: Johnny Lim <[email protected]>

Author: izeye

module/spring-boot-tracing/src/test/java/org/springframework/boot/tracing/autoconfigure/zipkin/ZipkinConfigurationsOpenTelemetryConfigurationTests.java

@@ -44,12 +44,11 @@ class ZipkinConfigurationsOpenTelemetryConfigurationTests {
 
 	@Test
 	void backsOffWithoutEncoding() {
-		new ApplicationContextRunner().withConfiguration(AutoConfigurations.of(OpenTelemetryConfiguration.class))
-			.run((context) -> {
-				assertThat(context).hasNotFailed();
-				assertThat(context).doesNotHaveBean(ZipkinSpanExporter.class);
-				assertThat(context).doesNotHaveBean(BytesEncoder.class);
-			});
+		new ApplicationContextRunner().withUserConfiguration(OpenTelemetryConfiguration.class).run((context) -> {
+			assertThat(context).hasNotFailed();
+			assertThat(context).doesNotHaveBean(ZipkinSpanExporter.class);
+			assertThat(context).doesNotHaveBean(BytesEncoder.class);
+		});
 	}
 
 	@Test