fix: build/clippy ci with removed esp32c3 feature

Author: filipton

.github/workflows/rust_ci.yaml

@@ -20,20 +20,14 @@ jobs:
       matrix:
         action:
           - command: build
-            args: --no-default-features --features=esp32c3 --target=riscv32imc-unknown-none-elf --release
+            args: --no-default-features --target=riscv32imc-unknown-none-elf --release
           - command: fmt
             args: --all -- --check --color always
           - command: clippy
-            args: --no-default-features --features=esp32c3 --target=riscv32imc-unknown-none-elf --workspace -- -D warnings
+            args: --no-default-features --target=riscv32imc-unknown-none-elf --workspace -- -D warnings
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-      - name: Setup Rust (xtensa)
-        uses: esp-rs/xtensa-toolchain@v1.5
-        with:
-          default: true
-          buildtargets: esp32
-          ldproxy: false
       - name: Setup Rust (riscv)
         uses: dtolnay/rust-toolchain@v1
         with: