[CLN] Remove cython installation as unused (#5315)

Signed-off-by: Anatoly Myachev <[email protected]>

Author: anmyachev

.github/WINDOWS.md

@@ -141,7 +141,7 @@ python -c 'import torch;print(torch.__version__)'
 Install build dependencies:
 
 ```
-pip install -U wheel pybind11 cython cmake
+pip install -U wheel pybind11 cmake
 ```
 
 Build and install Triton:

.github/workflows/build-test-windows.yml

@@ -119,7 +119,7 @@ jobs:
           .venv\Scripts\activate.ps1
           Invoke-BatchFile "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd ${{ env.NEW_WORKSPACE }}
-          pip install -U wheel pybind11 cython cmake
+          pip install -U wheel pybind11 cmake
           pip install -v '.[build,tests,tutorials]'
 
       - name: Triton version

.github/workflows/build-windows.yml

@@ -53,7 +53,7 @@ jobs:
           .venv\Scripts\activate.ps1
           Invoke-BatchFile "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd ${{ env.NEW_WORKSPACE }}
-          pip install -U wheel pybind11 cython cmake
+          pip install -U wheel pybind11 cmake
           pip install -v '.[build]'
 
       - name: Clean

.github/workflows/e2e-windows.yml

@@ -144,7 +144,7 @@ jobs:
           .venv\Scripts\activate.ps1
           Invoke-BatchFile "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd ${{ env.NEW_WORKSPACE }}
-          pip install -U wheel pybind11 cython cmake
+          pip install -U wheel pybind11 cmake
           pip install -v '.[build,tests,tutorials]'
 
       - name: Triton version

.github/workflows/inductor-tests-windows.yml

@@ -122,7 +122,7 @@ jobs:
           .venv\Scripts\activate.ps1
           Invoke-BatchFile "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd ${{ env.NEW_WORKSPACE }}
-          pip install -U wheel pybind11 cython cmake
+          pip install -U wheel pybind11 cmake
           pip install -v '.[build,tests,tutorials]'
 
       - name: Triton version

.github/workflows/pip-test-windows.yml

@@ -90,7 +90,7 @@ jobs:
           .venv\Scripts\activate.ps1
           Invoke-BatchFile "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
           cd ${{ env.NEW_WORKSPACE }}
-          pip install -U wheel pybind11 cython cmake intel-sycl-rt==2025.2.1
+          pip install -U wheel pybind11 cmake intel-sycl-rt==2025.2.1
           python setup.py -v bdist_wheel
           pip install (Get-Item ${{ env.NEW_WORKSPACE }}\dist\*.whl)