drv_soft_i2c.c was not in libraries

bsp/maxim/libraries/HAL_Drivers/SConscript

@@ -23,9 +23,6 @@ if GetDepend(['RT_USING_SPI']):
 if GetDepend(['RT_USING_I2C']):
     src += ['drv_i2c.c']
 
-if GetDepend(['RT_USING_I2C', 'RT_USING_I2C_BITOPS']):
-    src += ['drv_soft_i2c.c']
-
 if GetDepend(['BSP_USING_ONCHIP_RTC']):
     src += ['drv_rtc.c']