chore: Delete old dotfiles from swf-rs

swf/.gitignore

@@ -1,4 +0,0 @@
-target
-Cargo.lock
-rustfmt.toml
-*.bk

swf/.travis.yml

@@ -1,18 +0,0 @@
-language: rust
-rust:
-  - stable
-  - beta
-  - nightly
-cache: cargo
-matrix:
-  allow_failures:
-    - rust: nightly
-before_script:
-  - export PATH="$PATH:$HOME/.cargo/bin"
-  - (test $TRAVIS_RUST_VERSION != "nightly" || cargo install rustfmt-nightly || true)
-script:
-  - (test $TRAVIS_RUST_VERSION != "nightly" || cargo fmt -- --write-mode=diff)
-  - (test $TRAVIS_RUST_VERSION != "nightly" || cargo build --features "clippy")
-  - (test $TRAVIS_RUST_VERSION != "nightly" || cargo test --features "clippy")
-  - (test $TRAVIS_RUST_VERSION == "nightly" || cargo build)
-  - (test $TRAVIS_RUST_VERSION == "nightly" || cargo test)