[schematics/angular] No need to generate a module spec

[cexbrayat]

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Area

- [ ] devkit
- [x] schematics

Versions

Repro steps

When generating a module, a spec file is created.
This file has no real interest and was not generated before CLI v6 if I'm not mistaken.
It's possible to skip the generation with the spec option,
but as the test is not really useful, the test should never be created and the option removed?

module-spec git:master ❯ ng g m shared
CREATE src/app/shared/shared.module.spec.ts (275 bytes)
CREATE src/app/shared/shared.module.ts (190 bytes)

Desired functionality

It should not generate a spec file.

[damienwebdev]

So, the real question for me, and this has now come up in several separate ng6 projects, is WHY this came to be. Was this change intentional but never discussed, or was this a mistake? Generally, speaking most module specs are useless, but was there a use-case that supported ALWAYS generating a spec file?