Remove koishi simulator tests

They proved to be very fragile and of limited use in finding actual
issues.

.github/workflows/koishi.yml

@@ -28,20 +28,6 @@ jobs:
       - name: Clippy
         run: nix develop --command cargo clippy -- -Dwarnings
 
-  formatting-firmware-tests:
-    name: Formatting (firmware tests)
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: ./koishi/firmware-tests
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V27
-
-      - name: Clippy
-        run: nix develop --command cargo clippy -- -Dwarnings
-
   build-and-test-firmware:
     name: Build and Test (firmware)
     runs-on: ubuntu-latest
@@ -53,12 +39,5 @@ jobs:
       - name: Build
         working-directory: ./koishi/firmware
         run: |
-          # Build as intended for hardware first
           nix develop --command cargo build --release
           nix develop --command cargo build --release --features telemetry
-          # Build for simulator tests
-          nix develop --command cargo build --release --features simulator
-
-      - name: In Simulator Tests
-        working-directory: ./koishi/firmware-tests
-        run: nix develop --command cargo test

flake.nix

@@ -32,11 +32,6 @@
             ravedude
             pkgsCross.avr.buildPackages.gcc
 
-            # koishi firmware in-simulator tests
-            clang
-            libelf
-            zlib
-
             # satori firmware
             flip-link
             probe-rs