Remove rand from default features

.travis.yml

@@ -21,9 +21,10 @@ matrix:
     - rust: nightly
 
 script:
-  - cargo build --no-default-features --features "$CARGO_FEATURES"
-  - cargo test --no-default-features --features "$CARGO_FEATURES"
+  - cargo build --features "$CARGO_FEATURES"
+  - cargo test --features "$CARGO_FEATURES"
   - |
     if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
-      cargo bench --features "$CARGO_FEATURES"
+      # The benchmark always needs the 'rand' feature
+      cargo bench --features "$CARGO_FEATURES rand"
     fi

Cargo.toml

@@ -17,7 +17,6 @@ keywords = ["gamedev", "math", "matrix", "vector", "quaternion"]
 name = "cgmath"
 
 [features]
-default = ["rand"]
 unstable = []
 swizzle = []