Remove use of external Spring Build Conventions Gradle Plugins.

build.gradle

@@ -16,7 +16,6 @@ buildscript {
 		}
 	}
 	dependencies {
-		classpath 'io.spring.gradle:spring-build-conventions:0.0.38'
 		classpath "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"
 	}
 }