Remove dependency management for the Wavefront SDK

Closes gh-21295

Author: snicoll

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1804,13 +1804,6 @@ bom {
 			]
 		}
 	}
-	library("Wavefront SDK", "2.2") {
-		group("com.wavefront") {
-			modules = [
-					"wavefront-sdk-java"
-			]
-		}
-	}
 	library("WebJars HAL Browser", "3325375") {
 		group("org.webjars") {
 			modules = [