Delete spring-context's dependency on spring-beans-groovy

Commit 5648fbfc31 introduced a
compile-time dependency on spring-beans-groovy in the spring-context
module which breaks the build on the CI server since the Animal Sniffer
task cannot find a JAR file for spring-beans-groovy.

This commit reverts that change so that the "sniffer" task once again
succeeds.

build.gradle

@@ -455,7 +455,6 @@ project("spring-context") {
 	dependencies {
 		compile(project(":spring-aop"))
 		compile(project(":spring-beans"))
-		compile(project(":spring-beans-groovy"))
 		compile(project(":spring-expression"))
 		compile(project(":spring-core"))
 		compile(files(project(":spring-core").cglibRepackJar))