ci: Simplify travis.yml

Now that Cargo tests are being run on the worker node directly, we can
leave the bare minimum in Travis, which is taking care of the release
deployment.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

.travis.yml

@@ -3,24 +3,7 @@ language: rust
 rust:
   - stable
 
-before_script:
-  - rustup component add clippy
-  - rustup component add rustfmt
-  - cargo install --force cargo-audit
-
 script:
-  - cargo rustc --bin cloud-hypervisor -- -D warnings
-  - cargo rustc --bin vhost_user_net -- -D warnings
-  - cargo test
-  - cargo audit
-  - cargo rustc --bin cloud-hypervisor --no-default-features --features "pci,acpi"  -- -D warnings
-  - cargo rustc --bin vhost_user_net --no-default-features --features "pci,acpi"  -- -D warnings
-  - cargo clippy --all-targets --all-features -- -D warnings
-  - cargo rustc --bin cloud-hypervisor --no-default-features --features "pci"  -- -D warnings
-  - cargo rustc --bin vhost_user_net --no-default-features --features "pci"  -- -D warnings
-  - cargo rustc --bin cloud-hypervisor --no-default-features --features "mmio"  -- -D warnings
-  - cargo rustc --bin vhost_user_net --no-default-features --features "mmio"  -- -D warnings
-  - find . -name "*.rs" | xargs rustfmt --check
   - cargo build --release
   
 deploy: