fix(go): remove duplicated return statements

Author: rubenhoenle

languages/golang/templates/api.mustache

@@ -483,9 +483,6 @@ func (a *{{{classname}}}Service) {{nickname}}Execute(r {{#structPrefix}}{{&class
 			newErr.ErrorMessage = oapierror.FormatErrorMessage(localVarHTTPResponse.Status, &v)
 			newErr.Model = v
 			{{! TEMPLATE CUSTOMIZATION - END - use the GenericOpenAPIError struct from the core module instead of the one generated by OpenAPI generator by default }}
-			{{! TEMPLATE CUSTOMIZATION - BEGIN - don't return http response - would require closing after each SDK API call to prevent resource leaks }}
-			return {{#returnType}}localVarReturnValue, {{/returnType}} newErr
-			{{! TEMPLATE CUSTOMIZATION - END - don't return http response - would require closing after each SDK API call to prevent resource leaks }}
 			{{^-last}}
 			{{! TEMPLATE CUSTOMIZATION - BEGIN - don't return http response - would require closing after each SDK API call to prevent resource leaks }}
 			return {{#returnType}}localVarReturnValue, {{/returnType}} newErr