Remove cmake dependency

Cargo.lock

@@ -13,7 +13,6 @@ name = "bdwgc-alloc"
 version = "0.2.1"
 dependencies = [
  "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cmake 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -22,14 +21,6 @@ name = "cc"
 version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "cmake"
-version = "0.1.38"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "libc"
 version = "0.2.51"
@@ -38,5 +29,4 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [metadata]
 "checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
 "checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum cmake 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)" = "96210eec534fc3fbfc0452a63769424eaa80205fda6cea98e5b61cb3d97bcec8"
 "checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"

Cargo.toml

@@ -13,4 +13,3 @@ libc = "0.2"
 
 [build-dependencies]
 autotools = "0.2"
-cmake = "0.1"

build.rs

@@ -1,5 +1,3 @@
-extern crate cmake;
-
 const LIB_ATOMIC_OPS_DIR: &str = "vendor/libatomic_ops";
 const LIB_GC_DIR: &str = "vendor/bdwgc";