refactor: remove WSL2-specific YubiKey code

Removes WSL2 detection and workarounds from yubikey.py to keep the
codebase clean. WSL2 support was experimental and introduced complexity
without a fully working solution for interactive PIN/touch prompts.

Users on WSL2 should either:
- Install pcscd (sudo dnf install pcsc-lite) for native Linux plugin support
- Use Windows PowerShell directly for YubiKey operations

All 101 tests pass.

BREAKING CHANGE: WSL2 users previously relying on the experimental
WSL2 support will need to use one of the alternative approaches above.

Author: apitanga

.github/workflows/test.yml

@@ -12,8 +12,8 @@ on:
       - 'docs/**'
 
 jobs:
-  test-fedora:
-    runs-on: fedora-latest
+  test-linux:
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
@@ -72,20 +72,16 @@ jobs:
 
     - name: Check code formatting with black
       run: |
+        black --version
         black --check src/ tests/
     
     - name: Run linting with flake8
       run: |
         flake8 src/ tests/ --count --max-complexity=10 --statistics
     
-    - name: Run type checking with mypy
-      continue-on-error: true
-      run: |
-        mypy src/
-
   test-macos:
     runs-on: macos-latest
-    needs: test-fedora
+    needs: test-linux
     strategy:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
@@ -144,13 +140,32 @@ jobs:
 
     - name: Check code formatting with black
       run: |
+        black --version
         black --check src/ tests/
     
     - name: Run linting with flake8
       run: |
         flake8 src/ tests/ --count --max-complexity=10 --statistics
     
+  type-check:
+    runs-on: ubuntu-latest
+    needs: [test-linux, test-macos]
+    continue-on-error: true
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.12"
+    
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install mypy
+        pip install -e .
+    
     - name: Run type checking with mypy
-      continue-on-error: true
       run: |
         mypy src/

pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
 dev = [
     "pytest>=7.0.0",
     "pytest-cov>=4.0.0",
-    "black>=23.0.0",
+    "black~=24.0",
     "flake8>=6.0.0",
     "mypy>=1.0.0",
 ]