Revert "Merge pull request #1187 from aws/finks/unsupported-payloads"

This reverts commit fd18eaf, reversing
changes made to 310bad2.

Author: millems

codegen/src/main/java/software/amazon/awssdk/codegen/IntermediateModelBuilder.java

@@ -19,13 +19,11 @@
 import static software.amazon.awssdk.codegen.RemoveUnusedShapes.removeUnusedShapes;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
-import java.util.stream.Collectors;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import software.amazon.awssdk.codegen.customization.CodegenCustomizationProcessor;
@@ -55,8 +53,6 @@
  */
 public class IntermediateModelBuilder {
 
-    private static final List<String> NO_BODY_METHODS = Arrays.asList("GET", "HEAD", "DELETE");
-
     private static final Logger log = LoggerFactory.getLogger(IntermediateModelBuilder.class);
     private final CustomizationConfig customConfig;
     private final ServiceModel service;
@@ -161,28 +157,9 @@ public IntermediateModel build() {
 
         setSimpleMethods(trimmedModel);
 
-        validateOperations(trimmedModel);
-
         return trimmedModel;
     }
 
-    /**
-     * Validates that operations that use GET, DELETE or HEAD do not have an HTTP body.
-     */
-    private void validateOperations(IntermediateModel model) {
-        List<String> methods = model.getOperations()
-                                    .values()
-                                    .stream()
-                                    .filter(e -> e.getInputShape().hasPayloadMembers())
-                                    .filter(e -> NO_BODY_METHODS.contains(e.getInputShape().getMarshaller().getVerb()))
-                                    .map(e -> e.getInputShape().getC2jName())
-                                    .collect(Collectors.toList());
-
-        if (methods.size() > 0) {
-            throw new RuntimeException("An HTTP body is not allowed on GET/DELETE/HEAD requests. Invalid operations: " + methods);
-        }
-    }
-
     /**
      * Link the member to it's corresponding shape (if it exists).
      *