fix(test): Remove oneOf to test verbosity of basic output

fetchModuleSchemas.js

@@ -47,11 +47,7 @@ for (const module of modules) {
 
 fs.writeFileSync(`${modulesDir}/index.tsp`, 
 moduleImports.map(m => `import "./${m}";`).join("\n") + `
-import "@typespec/json-schema";
 
-using TypeSpec.JsonSchema;
-
-@oneOf
 union RepoModule {
 ${moduleModels.map(m => `  ${m}Module`).join(",\n")}
 }`

src-tsp/main.tsp

@@ -66,7 +66,6 @@ model StageList {
   stages: Array<StageEntry>;
 }
 
-@oneOf
 union StageEntry {
   Stage,
   ImportedModule,
@@ -103,14 +102,12 @@ model ModuleList {
   modules: Array<ModuleEntry>;
 }
 
-@oneOf
 union ModuleEntry {
   Module,
   ImportedModule,
 }
 
 @jsonSchema("module-v1.json")
-@oneOf
 union Module {
   RepoModule,
   CustomModule,