chore: remove legacy build_tools directory (#246)

Author: darvid

.claude/CLAUDE.md

@@ -178,7 +178,6 @@ src/hyperscan/
 
 tests/                  # pytest test suite
 examples/               # Usage examples & benchmarks
-build_tools/            # Cross-platform build scripts
 cmake/                  # CMake configuration
 ```
 

.github/workflows/build.yml

@@ -148,7 +148,7 @@ jobs:
           fi
 
           RESULT=1
-          echo "$CHANGED_FILES" | grep -q -E '^(src/hyperscan/|README.md|CMakeLists.txt|pyproject.toml|MANIFEST.in|cmake/|build_tools/)' || RESULT=$?
+          echo "$CHANGED_FILES" | grep -q -E '^(src/hyperscan/|README.md|CMakeLists.txt|pyproject.toml|MANIFEST.in|cmake/)' || RESULT=$?
 
           if [[ "$RESULT" -eq 0 ]]; then
             echo "should_build=true" >> "$GITHUB_OUTPUT"

.github/workflows/release.yml

@@ -38,7 +38,7 @@ jobs:
           echo "${CHANGED_FILES}"
 
           CHANGES=0
-          echo "${CHANGED_FILES}" | grep -c -E '^(src/hyperscan/|README.md|CMakeLists.txt|pyproject.toml|MANIFEST.in|cmake/|build_tools/)' || CHANGES=$?
+          echo "${CHANGED_FILES}" | grep -c -E '^(src/hyperscan/|README.md|CMakeLists.txt|pyproject.toml|MANIFEST.in|cmake/)' || CHANGES=$?
 
           if [[ "$CHANGES" -gt 0 ]]; then
             # The last commit already triggered a build, no need to force

.gitignore

@@ -29,7 +29,6 @@ parts/
 sdist/
 var/
 wheels/
-!build_tools/wheels
 share/python-wheels/
 *.egg-info/
 .installed.cfg
@@ -171,9 +170,4 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
-# Windows build artifacts that should not be version controlled.
-/build_tools/windows/*.zip
-/build_tools/windows/*.tar.*
-/build_tools/windows/hyperscan
-
 github_ci_*

CLAUDE.md

@@ -74,7 +74,6 @@ src/hyperscan/
 
 tests/                  # pytest test suite
 examples/               # Usage examples & benchmarks
-build_tools/            # Cross-platform build scripts
 cmake/                  # CMake configuration
 ```