UBLOX_C029: remove emac implementation

It depends on the driver that will come separately, therefore this will be
enabled once driver is in place.

Author: 0xc0170

hal/targets.json

@@ -1217,7 +1217,7 @@
         "extra_labels": ["STM", "STM32F4", "STM32F439", "STM32F439ZI"],
         "macros": ["HSE_VALUE=24000000", "HSE_STARTUP_TIMEOUT=5000", "CB_INTERFACE_SDIO","CB_CHIP_WL18XX","SUPPORT_80211D_ALWAYS","WLAN_ENABLED"],
         "inherits": ["Target"],
-        "device_has": ["ANALOGIN", "CAN", "EMAC", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
+        "device_has": ["ANALOGIN", "CAN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
         "features": ["IPV4"],
         "release_versions": ["5"]
     },