Remove long-dead travis config

ebpf/aya-ebpf-cty/.travis.yml

@@ -1,32 +0,0 @@
-language: rust
-
-matrix:
-  include:
-      # MSRV
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: 1.30.0
-
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: stable
-
-before_install: set -e
-
-install:
-  - sh ci/install.sh
-
-script:
-  - sh ci/script.sh
-
-after_script: set +e
-
-cache: cargo
-
-branches:
-  only:
-    - master
-    - staging
-    - trying
-
-notifications:
-  email:
-    on_success: never

ebpf/aya-ebpf-cty/ci/install.sh

@@ -1,7 +0,0 @@
-set -ex
-
-main() {
-    return
-}
-
-main

ebpf/aya-ebpf-cty/ci/script.sh

@@ -1,10 +0,0 @@
-set -ex
-
-main() {
-    for target in $(rustup target list | grep linux-gnu | cut -d' ' -f1); do
-        rustup target add $target || continue
-        cargo check --target $target
-    done
-}
-
-main