Remove unmaintained C++ implementation

.github/workflows/test.yml

@@ -16,12 +16,4 @@ jobs:
       run: npm ci
 
     - name: Run tests
-      run: npm test
-  cpp:
-      runs-on: ubuntu-latest
-      steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Test C++
-        run: make test
+      run: npm test

.gitignore

@@ -1,3 +1 @@
-mason_packages
 node_modules
-build

README.md

@@ -48,20 +48,6 @@ Be careful to pick precision appropriate for the input units. E.g. in case of ge
 [TypeScript type definitions](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/polylabel)
 are available via `npm install --save @types/polylabel`.
 
-### C++ Usage
-
-It is recommended to install polylabel via [mason](https://github.com/mapbox/mason). You will also need to install its dependencies: [geometry.hpp](https://github.com/mapbox/geometry.hpp) and [variant](https://github.com/mapbox/variant).
-
-```C++
-#include <mapbox/polylabel.hpp>
-
-int main() {
-    mapbox::geometry::polygon<double> polygon = readPolygon(); // Get polygon data from somewhere.
-    mapbox::geometry::point<double> p = mapbox::polylabel(polygon, 1.0);
-    return 0;
-}
-```
-
 #### Ports to other languages
 
 - [andrewharvey/geojson-polygon-labels](https://github.com/andrewharvey/geojson-polygon-labels) (CLI)