Remove grouped tool_req__docs_metamodel

[AlexanderLanin]

Old attempt of semi-architecture. But we dont want to do architecture for docs-as-code tool.

[github-actions]

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[License Check Output]
Extracting Bazel installation...
Starting local Bazel server (8.3.0) and connecting to it...
INFO: Invocation ID: fd4a78e2-7e25-4141-8d9d-80b3cd9b6c02
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    currently loading: src
Analyzing: target //src:license-check (1 packages loaded, 0 targets configured)
Analyzing: target //src:license-check (1 packages loaded, 0 targets configured)

Analyzing: target //src:license-check (72 packages loaded, 9 targets configured)

Analyzing: target //src:license-check (126 packages loaded, 2309 targets configured)

Analyzing: target //src:license-check (134 packages loaded, 2484 targets configured)

INFO: Analyzed target //src:license-check (137 packages loaded, 4500 targets configured).
[3 / 12] [Prepa] Creating source manifest for @@score_tooling+//dash/tool/formatters:dash_format_converter [for tool]
INFO: Found 1 target...
Target //src:license.check.license_check up-to-date:
  bazel-bin/src/license.check.license_check
  bazel-bin/src/license.check.license_check.jar
INFO: Elapsed time: 14.566s, Critical Path: 0.38s
INFO: 13 processes: 4 disk cache hit, 9 internal.
INFO: Build completed successfully, 13 total actions
INFO: Running command line: bazel-bin/src/license.check.license_check src/formatted.txt <args omitted>
usage: org.eclipse.dash.licenses.cli.Main [-batch <int>] [-cd <url>]
       [-confidence <int>] [-ef <url>] [-excludeSources <sources>] [-help] [-lic
       <url>] [-project <shortname>] [-repo <url>] [-review] [-summary <file>]
       [-timeout <seconds>] [-token <token>]

[RolandJentschETAS]

This PR fixes #354.

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Did not see that tests don't pass.

[MaximilianSoerenPollak]

There is testcases now linked to something that doesn't exist.

Need 'testcase__test_strips_whitespace_EWKFN' has unknown outgoing link 'tool_req__docs_metamodel' in field 'partially_verifies' [needs.external_link_outgoing]
WARNING: https://github.com/etas-contrib/score_docs-as-code/blob/ae8faa972c6ecdd9f22becb688205857c8a7e5fa/src/extensions/score_metamodel/tests/test_metamodel__init__.py#L75: Need 'testcase__test_raises_assertion_for_invalid_check_PVYCN' has unknown outgoing link 'tool_req__docs_metamodel' in field 'partially_verifies' [needs.external_link_outgoing]

We probably should fix that?

[AlexanderLanin]

Hups