Remove FunctionType from docs and AWS sample

Resolves #808

docs/src/main/asciidoc/adapters/aws.adoc

@@ -31,7 +31,7 @@ public class FuncApplication implements ApplicationContextInitializer<GenericApp
 	public void initialize(GenericApplicationContext context) {
 		context.registerBean("function", FunctionRegistration.class,
 			() -> new FunctionRegistration<Function<Foo, Bar>>(function())
-				.type(FunctionType.from(Foo.class).to(Bar.class).getType()));
+                .type(FunctionTypeUtils.functionType(Foo.class, Bar.class)));
 	}
 
 }

docs/src/main/asciidoc/functional.adoc

@@ -40,7 +40,7 @@ public class DemoApplication implements ApplicationContextInitializer<GenericApp
   public void initialize(GenericApplicationContext context) {
     context.registerBean("demo", FunctionRegistration.class,
         () -> new FunctionRegistration<>(uppercase())
-            .type(FunctionType.from(String.class).to(String.class)));
+            .type(FunctionTypeUtils.functionType(String.class, String.class)));
   }
 
 }