[libcpu/common] 修正对RV32E的支持，移除无用文件 #6353

Job	Run time
🔍 Summary of Git Diff Changes	38s
at32_hc32_ht32	4m 1s
RTduino_Arduino Libraries (Raspberry Pico)	5m 47s
RT-Thread Online Packages (STM32F407 RT-Spark)	5m 54s
others_ft32_mm32_acm32	3m 9s
stm32f0_f1	4m 31s
stm32_f7_g0_h7_mp15_u5_h5_wb5	7m 55s
stm32_f2_f4	11m 20s
nxp_renesas	5m 8s
aarch64	1m 20s
gd32_n32_apm32	3m 37s
nuvoton	3m 42s
riscv-none	2m 48s
riscv64-unknown	1m 6s
mips	1m 7s
Infineon_TI_microchip	5m 44s
simulator	1m 2s
hpmicro	59s
nordic(yml)	7m 10s
K230	1m 12s
xuantie	1m 5s
ESP32C3	6m 59s
i386-unknown	41s
llvm-arm	3m 34s
arm-none-bsp-smart	2m 21s
stm32l4	9m 48s
collect-artifacts	-1s
	1h 42m 37s

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