remove python support

pyo3 is not supported for petgraph, which blocks the python support for this crate

Cargo.toml

@@ -12,14 +12,5 @@ readme = "README.md"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[lib]
-name = "valley_free"
-crate-type = ["cdylib", "rlib"]
-
 [dependencies]
-pyo3 = "0.15.1"
 petgraph = "0.6.4"
-
-[features]
-py = ["pyo3/extension-module"]
-default = []

README.md

@@ -79,29 +79,4 @@ on the root directory.
 
 The examples are available in the [`examples/`](examples/) direction.
 
-You can run it with `cargo run --example=<filename without .rs>`.
-
-### Python
-
-The package is available on PyPi at https://pypi.org/project/valley-free/. 
-For installation, `pip3 install valley-free` should do the trick.
-
-``` python
-#!/usr/bin/env python3
-
-import valley_free
-
-topo = valley_free.load_topology("20161101.as-rel.txt.bz2")
-paths = valley_free.propagate_paths(topo, 15169)
-
-print(len(paths))
-# 117074
-```
-
-#### Manually build Python package 
-
-Build for current Python environment:
-`maturin build --release --features py`
-
-Build using manylinux environment:
-`docker run --rm -v $(pwd):/io konstin2/maturin build --release --features py`
+You can run it with `cargo run --example=<filename without .rs>`.