Remove cargo CI

.github/workflows/main.yml

@@ -1,25 +0,0 @@
-name: main
-
-on:
-  push:
-    branches: [ main ]
-  schedule:
-    - cron: 0 0 1 * *
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  cargo-test:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout source
-        uses: actions/checkout@v2
-
-      - uses: Swatinem/rust-cache@v1
-
-      - name: cargo test
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --workspace --all-features

.github/workflows/pr.yml

@@ -1,35 +0,0 @@
-name: PR
-
-on:
-  pull_request:
-    branches: [ main ]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  cargo-test-and-lint:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout source
-        uses: actions/checkout@v2
-
-      - uses: Swatinem/rust-cache@v1
-
-      - name: cargo test
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --workspace --all-features
-
-      - name: rustfmt
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
-
-      - name: clippy
-        uses: actions-rs/clippy-check@v1
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          args: --all --all-features --tests -- -D warnings