GH-1109: Remove deprecated KafkaEmbedded

Fixes #1109

Since we can't guarantee that JUnit 4 is going to be on classpath
for the `KafkaTestUtils` it would be better to remove already deprecated
methods in that class for the `KafkaEmbedded`.
At the same time since the `KafkaEmbedded` is deprecated already and
there is a good workaround with a new code, remove it altogether as well

Author: artembilan

spring-kafka-test/src/main/java/org/springframework/kafka/test/rule/KafkaEmbedded.java

@@ -57,33 +57,6 @@ private KafkaTestUtils() {
 		// private ctor
 	}
 
-	/**
-	 * Set up test properties for an {@code <Integer, String>} consumer.
-	 * @param group the group id.
-	 * @param autoCommit the auto commit.
-	 * @param embeddedKafka a {@link org.springframework.kafka.test.rule.KafkaEmbedded} instance.
-	 * @return the properties.
-	 * @deprecated since 2.2 in favor of {@link #consumerProps(String, String, EmbeddedKafkaBroker)}
-	 */
-	@SuppressWarnings("deprecation")
-	@Deprecated
-	public static Map<String, Object> consumerProps(String group, String autoCommit,
-			org.springframework.kafka.test.rule.KafkaEmbedded embeddedKafka) {
-		return consumerProps(embeddedKafka.getBrokersAsString(), group, autoCommit);
-	}
-
-	/**
-	 * Set up test properties for an {@code <Integer, String>} producer.
-	 * @param embeddedKafka a {@link org.springframework.kafka.test.rule.KafkaEmbedded} instance.
-	 * @return the properties.
-	 * @deprecated since 2.2 in favor of {@link #producerProps(EmbeddedKafkaBroker)}
-	 */
-	@SuppressWarnings("deprecation")
-	@Deprecated
-	public static Map<String, Object> producerProps(org.springframework.kafka.test.rule.KafkaEmbedded embeddedKafka) {
-		return senderProps(embeddedKafka.getBrokersAsString());
-	}
-
 	/**
 	 * Set up test properties for an {@code <Integer, String>} consumer.
 	 * @param group the group id.