I request that classifiers in METADATA what is created at build command are unique

[yuji38kwmt]

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the FAQ and general documentation and believe that my question is not already covered.

Feature Request

When executing poetry build, poetry automatically added python requirement classifiers and license classifier.

When python requirement classifiers are already listed in pyproject.toml , classifiers in dist/*.whl/*.dist-info/METADATA are duplicated

An example is shown below.

[tool.poetry]
name = "yuji38kwmt-cli"
version = "0.1.0"
description = "yuji38kwmt's CLI"
authors = ["yuji38kwmt"]
license = "MIT"
classifiers = [
    "Operating System :: OS Independent",
    "Operating System :: OS Independent",
    "License :: OSI Approved :: MIT License",
    "Programming Language :: Python :: 3",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
]

packages = [
    { include = "yuji38kwmt_cli" }
]

[tool.poetry.dependencies]
python = "^3.9"
requests = "*"

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

$ poetry build --quiet

$ unzip -c  dist/yuji38kwmt_cli-0.1.0-py3-none-any.whl yuji38kwmt_cli-0.1.0.dist-info/METADATA | cat
Archive:  dist/yuji38kwmt_cli-0.1.0-py3-none-any.whl
  inflating: yuji38kwmt_cli-0.1.0.dist-info/METADATA  
Metadata-Version: 2.1
Name: yuji38kwmt-cli
Version: 0.1.0
Summary: yuji38kwmt's CLI
License: MIT
Author: yuji38kwmt
Requires-Python: >=3.9,<4.0
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.9
Requires-Dist: requests

Operating System and License classifiers are unique. But Programming Language classifiers are duplicated.

I request that Programming Language classifiers are also unique.

[dimbleby]

code looks as though it's here, submit a merge request!

[yuji38kwmt]

OK! I create pull request python-poetry/poetry-core#578 .

[github-actions]

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