DATAJDBC-569 - Removes unused TestDatabaseFeatures.

Original pull request: #236.

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/JdbcRepositoryIntegrationTests.java

@@ -259,7 +259,6 @@ public class JdbcRepositoryIntegrationTests {
 	}
 
 	@Test // DATAJDBC-464, DATAJDBC-318
-	@EnabledOnFeature(SUPPORTS_DATE_DATATYPES)
 	public void executeQueryWithParameterRequiringConversion() {
 
 		Instant now = Instant.now();

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/testing/TestDatabaseFeatures.java

@@ -42,14 +42,6 @@ public class TestDatabaseFeatures {
 		database = Arrays.stream(Database.values()).filter(db -> db.matches(productName)).findFirst().get();
 	}
 
-	/**
-	 * Oracle returns an oracle.sql.TIMESTAMP which currently cannot be converted to an Instant. See DATAJDBC-569 for
-	 * reference.
-	 */
-	private void supportsDateDataTypes() {
-		assumeThat(database).isNotEqualTo(Database.Oracle);
-	}
-
 	/**
 	 * Not all databases support really huge numbers as represented by {@link java.math.BigDecimal} and similar.
 	 */
@@ -57,13 +49,6 @@ public class TestDatabaseFeatures {
 		assumeThat(database).isNotIn(Database.Oracle, Database.SqlServer);
 	}
 
-	/**
-	 * Oracle does not allow to specify an alias for a joined table with {@code AS}. See DATAJDBC-570 for reference.
-	 */
-	private void supportsAsForJoinAlias() {
-		assumeThat(database).isNotEqualTo(Database.Oracle);
-	}
-
 	/**
 	 * Oracles JDBC driver seems to have a bug that makes it impossible to acquire generated keys when the column is
 	 * quoted. See
@@ -119,7 +104,6 @@ public class TestDatabaseFeatures {
 
 	public enum Feature {
 
-		SUPPORTS_DATE_DATATYPES(TestDatabaseFeatures::supportsDateDataTypes), //
 		SUPPORTS_MULTIDIMENSIONAL_ARRAYS(TestDatabaseFeatures::supportsMultiDimensionalArrays), //
 		SUPPORTS_QUOTED_IDS(TestDatabaseFeatures::supportsQuotedIds), //
 		SUPPORTS_HUGE_NUMBERS(TestDatabaseFeatures::supportsHugeNumbers), //