Revert "Add jetty-server to classpath for integration test"

This reverts commit 4e55f2aab4.

This workaround is no longer required with the latest Micrometer
snapshot.

spring-boot-tests/spring-boot-deployment-tests/build.gradle

@@ -10,7 +10,6 @@ dependencies {
 	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-web")) {
 		exclude group: "org.hibernate.validator"
 	}
-	implementation("org.eclipse.jetty:jetty-server")
 
 	intTestImplementation(enforcedPlatform(project(path: ":spring-boot-project:spring-boot-parent")))
 	intTestImplementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-test"))