fix: revert support for empty/undefined request body

Author: maxholman

lib/request-body.ts

@@ -3,35 +3,31 @@ import type { OpenAPIV3_1 } from 'openapi-types';
 import { MediaType, type MediaTypeOptions } from './media-type.js';
 
 export interface RequestBodyOptions {
-  content?: MediaType | MediaTypeOptions;
+  content: MediaType | MediaTypeOptions;
   description?: string;
   required?: boolean;
 }
 
 export class RequestBody extends Construct {
   private options: RequestBodyOptions;
 
-  private content: MediaType | undefined;
+  private content: MediaType;
 
   constructor(scope: Construct, id: string, options: RequestBodyOptions) {
     super(scope, id);
     this.options = options;
 
-    if (options.content) {
-      this.content =
-        options.content instanceof MediaType
-          ? options.content
-          : new MediaType(this, id, options.content);
-    }
+    this.content =
+      options.content instanceof MediaType
+        ? options.content
+        : new MediaType(this, id, options.content);
   }
 
   public synth(): OpenAPIV3_1.RequestBodyObject {
     return {
       description: this.options.description || '',
       content: {
-        ...(this.content && {
-          [this.content.contentType]: this.content.synth(),
-        }),
+        [this.options.content.contentType]: this.content.synth(),
       },
       ...(this.options.required && { required: this.options.required }),
     };