CI: remove self-hosted runner

.github/workflows/on-target.yml

@@ -32,49 +32,3 @@ jobs:
             -nographic \
             -semihosting-config enable=on,target=native \
             -kernel target/thumbv7m-none-eabi/debug/testsuite
-
-  hil-compile-rtt:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: thumbv6m-none-eabi
-      - name: Modify linkerfile
-        run: |
-          sed -i 's/FLASH : ORIGIN = 0x00000000, LENGTH = 256K/FLASH : ORIGIN = 0x8000000, LENGTH = 128K/g' memory.x
-          sed -i 's/RAM : ORIGIN = 0x20000000, LENGTH = 64K/RAM : ORIGIN = 0x20000000, LENGTH = 16K/g' memory.x
-      - name: Build testsuite
-        env:
-          RUSTFLAGS: -C link-arg=-Tlink.x -D warnings
-        run: cargo build -p testsuite --target thumbv6m-none-eabi --features rtt
-      - name: Upload testsuite binaries
-        uses: actions/upload-artifact@v4
-        with:
-          name: testsuite-bin
-          if-no-files-found: error
-          retention-days: 1
-          path: target/thumbv6m-none-eabi/debug/testsuite
-
-  hil-stm32:
-    runs-on: self-hosted
-    needs:
-      - hil-compile-rtt
-    steps:
-      - uses: actions/checkout@v4
-      - name: Display probe-rs version
-        run: probe-rs --version
-      - name: List probes
-        run: probe-rs list
-      - uses: actions/download-artifact@v4
-        with:
-          name: testsuite-bin
-          path: testsuite-bin
-      - name: Run on-target tests
-        timeout-minutes: 5
-        run: |
-          probe-rs run \
-          --chip STM32F070RBTx \
-          --connect-under-reset \
-          --probe 0483:374b:066CFF504955857567220634 \
-          testsuite-bin/testsuite