Remove unnecessary dep mgmt in skipper parent

There is already a dependency management section for testcontainers
in the proper 2 places (spring-cloud-dataflow-parent and
spring-cloud-dataflow-build-dependencies). This commit removes this
cruft.

spring-cloud-skipper/pom.xml

@@ -39,9 +39,6 @@
 		<javadoc.opts>-Xdoclint:none</javadoc.opts>
 
 		<jmockit.version>1.24</jmockit.version>
-
-		<testcontainers.version>1.19.7</testcontainers.version>
-		<commons-compress.version>1.26.0</commons-compress.version>
 		<asciidoctor.maven.plugin.version>2.2.4</asciidoctor.maven.plugin.version>
 		<asciidoctorj.pdf.version>2.3.7</asciidoctorj.pdf.version>
 		<asciidoctorj.version>2.5.7</asciidoctorj.version>
@@ -209,24 +206,6 @@
 				<artifactId>jmockit</artifactId>
 				<version>${jmockit.version}</version>
 			</dependency>
-			<dependency>
-				<groupId>org.testcontainers</groupId>
-				<artifactId>testcontainers-bom</artifactId>
-				<version>${testcontainers.version}</version>
-				<exclusions>
-					<exclusion>
-						<groupId>org.apache.commons</groupId>
-						<artifactId>commons-compress</artifactId>
-					</exclusion>
-				</exclusions>
-				<type>pom</type>
-				<scope>import</scope>
-			</dependency>
-			<dependency>
-				<groupId>org.apache.commons</groupId>
-				<artifactId>commons-compress</artifactId>
-				<version>${commons-compress.version}</version>
-			</dependency>
 		</dependencies>
 	</dependencyManagement>
 	<build>