Remove redundant @GrabResolver transform

Previously, a transform was used to add @GrabResolver annotations
during compilation that added the Spring milestone and snapshot
repositories. This functionality is now handled by
RepositoryConfigurationFactory so the transform is no longer required.

Author: wilkinsona

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/GroovyCompiler.java

@@ -107,7 +107,6 @@ public GroovyCompiler(final GroovyCompilerConfiguration configuration) {
 		}
 
 		this.transformations = new ArrayList<ASTTransformation>();
-		// this.transformations.add(new GrabResolversAutoConfigurationTransformation());
 		this.transformations.add(new DependencyAutoConfigurationTransformation(
 				this.loader, this.coordinatesResolver, this.compilerAutoConfigurations));
 		this.transformations.add(new GroovyBeansTransformation());