Update action.yml

Author: mysterywolf

.github/workflows/action.yml

@@ -30,7 +30,6 @@ jobs:
       matrix:
        legs:
          - {RTT_BSP: "acm32/acm32f0x0-nucleo", RTT_TOOL_CHAIN: "sourcery-arm"}
-         - {RTT_BSP: "acm32/acm32f4xx-nucleo", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "CME_M7", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "apm32/apm32f103xe-minibroard", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "apollo2", RTT_TOOL_CHAIN: "sourcery-arm"}