Remove extra blank line after oneOf type declaration

The modelOneOf template had a double blank line between the type
declaration and the FromJSON function.

Author: guizmaii

modules/openapi-generator/src/main/resources/typescript-fetch/modelOneOf.mustache

@@ -21,7 +21,6 @@ import {
 {{/hasImports}}
 {{>modelOneOfInterfaces}}
 
-
 export function {{classname}}FromJSON(json: any): {{classname}} {
     return {{classname}}FromJSONTyped(json, false);
 }

samples/client/petstore/typescript-fetch/builds/oneOf/models/TestArrayResponse.ts

@@ -33,7 +33,6 @@ import {
  * @export
  */
 export type TestArrayResponse = Array<TestA> | Array<TestB> | Array<string>;
-
 export function TestArrayResponseFromJSON(json: any): TestArrayResponse {
     return TestArrayResponseFromJSONTyped(json, false);
 }

samples/client/petstore/typescript-fetch/builds/oneOf/models/TestDiscriminatorResponse.ts

@@ -33,7 +33,6 @@ import {
  * @export
  */
 export type TestDiscriminatorResponse = OptionOne | OptionTwo;
-
 export function TestDiscriminatorResponseFromJSON(json: any): TestDiscriminatorResponse {
     return TestDiscriminatorResponseFromJSONTyped(json, false);
 }

samples/client/petstore/typescript-fetch/builds/oneOf/models/TestResponse.ts

@@ -33,7 +33,6 @@ import {
  * @export
  */
 export type TestResponse = TestA | TestB | string;
-
 export function TestResponseFromJSON(json: any): TestResponse {
     return TestResponseFromJSONTyped(json, false);
 }