Remove image generation with maven build

- Making build slow and seem to error time to time.
- Images are generated with pack anyway.

Author: jvalkeal

spring-cloud-dataflow-server/pom.xml

@@ -165,22 +165,6 @@
 					</execution>
 				</executions>
 			</plugin>
-			<plugin>
-				<groupId>org.springframework.boot</groupId>
-				<artifactId>spring-boot-maven-plugin</artifactId>
-				<executions>
-					<execution>
-						<goals>
-							<goal>build-image</goal>
-						</goals>
-					</execution>
-				</executions>
-				<configuration>
-					<imageName>
-						springcloud/${project.artifactId}:${project.version}
-					</imageName>
-				</configuration>
-			</plugin>
 		</plugins>
 	</build>