Remove SNAPSHOT plugin until after first release

Issue gh-4

Author: sjohnr

build.gradle

@@ -1,17 +1,10 @@
 plugins {
 	id "io.spring.convention.root"
-	id "io.spring.security.release" version "1.0.1-SNAPSHOT"
 }
 
 group = "io.spring.gradle"
 description = "Spring Security Release Tools"
 
-springRelease {
-	repositoryOwner = "spring-io"
-	weekOfMonth = 2
-	dayOfWeek = 1
-}
-
 if (hasProperty("buildScan")) {
 	buildScan {
 		termsOfServiceUrl = "https://gradle.com/terms-of-service"