Update README.md

README.md

@@ -121,7 +121,6 @@ Based on [STM32F103 BluePill](https://github.com/RT-Thread/rt-thread/tree/master
 ## Simulator
 
 RT-Thread BSP can be compiled directly and downloaded to the corresponding development board for use. In addition, RT-Thread also provides qemu-vexpress-a9 BSP, which can be used without hardware platform. See the getting started guide below for details. Getting Started of QEMU with Env:
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 [Windows](documentation/quick-start/quick_start_qemu/quick_start_qemu.md) | [Linux Ubuntu](documentation/quick-start/quick_start_qemu/quick_start_qemu_linux.md) | [Mac OS](documentation/quick-start/quick_start_qemu/quick_start_qemu_macos.md)
 
 # License