Comment out 'groovy.version' extension declaration.

build.gradle

@@ -15,7 +15,7 @@ apply plugin: 'io.spring.convention.root'
 group = 'org.springframework.session'
 description = 'Spring Session for Apache Geode'
 
-ext['groovy.version'] = "$groovyVersion"
+//ext['groovy.version'] = "$groovyVersion"
 //ext['spring.version'] = "$springVersion"
 //ext['spring-data-releasetrain.version'] = "$springDataReleaseTrainVersion"
 //ext['spring-session-bom.version'] = "$springSessionBomVersion"

gradle/dependency-management.gradle

@@ -1,4 +1,4 @@
-	dependencyManagement {
+dependencyManagement {
 	imports {
 		mavenBom "org.springframework.boot:spring-boot-dependencies:$springBootVersion"
 	}