Remove deprecated PIP_NO_PYTHON_VERSION_WARNING

Author: Hind-M

.github/workflows/unix_impl.yml

@@ -162,7 +162,7 @@ jobs:
         run: |
           export TEST_MAMBA_EXE=$(pwd)/build/micromamba/mamba
           unset CONDARC  # Interferes with tests
-          python -m pytest micromamba/tests/test_install.py::TestInstall::test_no_python_pinning \
+          python -m pytest micromamba/tests/ \
             ${{ runner.debug == 'true' && '-v --capture=tee-sys' || '--exitfirst' }}
 
   verify_pkg_tests:

.github/workflows/windows_impl.yml

@@ -149,5 +149,5 @@ jobs:
           $env:TEST_MAMBA_EXE = Join-Path -Path $pwd -ChildPath 'local\bin\mamba.exe'
           $env:MAMBA_TEST_SHELL_TYPE='powershell'
           Remove-Item -Path "env:CONDARC"
-          python -m pytest micromamba/tests/test_install.py::TestInstall::test_no_python_pinning `
+          python -m pytest micromamba/tests/ `
             ${{ runner.debug == 'true' && '-v --capture=tee-sys' || '--exitfirst' }}

libmamba/src/core/prefix_data.cpp

@@ -227,7 +227,6 @@ namespace mamba
             { "PYTHONIOENCODING", "utf-8" },
             { "NO_COLOR", "1" },
             { "PIP_NO_COLOR", "1" },
-            { "PIP_NO_PYTHON_VERSION_WARNING", "1" },
         };
         reproc::options run_options;
         run_options.env.extra = reproc::env{ env };

micromamba/tests/test_install.py

@@ -481,9 +481,7 @@ def test_channel_alias(self, alias, existing_cache):
     )
     def test_no_python_pinning(self, existing_cache):
         helpers.install("python=3.9.19", no_dry_run=True)
-        res = helpers.install("setuptools=63.4.3", "--no-py-pin")
-        print("RES: ", res)
-        # res = helpers.install("setuptools=63.4.3", "--no-py-pin", "--json")
+        res = helpers.install("setuptools=63.4.3", "--no-py-pin", "--json")
 
         keys = {"success", "prefix", "actions", "dry_run"}
         assert keys.issubset(set(res.keys()))