Remove dependency management for jackson-datatype-jaxrs

We've downgraded to 2.7.x so we need to remove the dependency
management for jackson-datatype-jaxrs which is new in Jackson 2.8

Closes gh-6508
See gh-6369

spring-boot-dependencies/pom.xml

@@ -667,11 +667,6 @@
 				<artifactId>jackson-datatype-hibernate5</artifactId>
 				<version>${jackson.version}</version>
 			</dependency>
-			<dependency>
-				<groupId>com.fasterxml.jackson.datatype</groupId>
-				<artifactId>jackson-datatype-jaxrs</artifactId>
-				<version>${jackson.version}</version>
-			</dependency>
 			<dependency>
 				<groupId>com.fasterxml.jackson.datatype</groupId>
 				<artifactId>jackson-datatype-jdk8</artifactId>