Angular Client Content-Type header not stripped on bodyless requests #3987

Description

In the generated @hey-api/client-angular client, the following snippet will remove the 'Content-Type' header, but does not reassign the HttpHeaders to opts.headers. Angular's HttpHeaders are immutable and .delete() returns a copy with the header removed.

https://github.com/hey-api/openapi-ts/blob/82e9f18f9076948c08d3bbdadbca2f7b8c4df017/packages/openapi-ts/src/plugins/%40hey-api/client-angular/bundle/client.ts#L83-L86

Reproducible example or configuration

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