Remove mips builds from CI

These continue to be difficult to maintain, especially considering we
don't really use any mips target routers anymore as the processing power
is too low.

.github/workflows/rust.yml

@@ -48,22 +48,6 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - name: Run Cargo Audit
         run: cargo install cargo-audit && cargo audit
-  cross-mips:
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: Swatinem/rust-cache@v2
-      - name: Cross test mips
-        run: cargo install cross && cross test --target mips-unknown-linux-musl --verbose -- --test-threads=1
-  cross-mipsel:
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: Swatinem/rust-cache@v2
-      - name: Cross test mipsel
-        run: cargo install cross && cross test --target mipsel-unknown-linux-musl --verbose -- --test-threads=1
   cross-aarch64:
     needs: test
     runs-on: ubuntu-latest
@@ -144,4 +128,4 @@ jobs:
       - name: Install Wireguard
         run: sudo apt-get update && sudo apt install -y wireguard linux-source linux-headers-$(uname -r) build-essential && sudo modprobe wireguard
       - name: Run integration test
-        run: bash scripts/integration_tests/all-up-test.sh MIGRATION_TEST
+        run: bash scripts/integration_tests/all-up-test.sh MIGRATION_TEST