Reverted to use GPIO 17, 18 as I2C for Heltec v4 repeater

Author: IoTThinks

variants/heltec_v4/platformio.ini

@@ -52,8 +52,6 @@ build_flags =
   -D HELTEC_LORA_V4_OLED
   -D PIN_BOARD_SDA=17
   -D PIN_BOARD_SCL=18
-  -D ENV_PIN_SDA=4
-  -D ENV_PIN_SCL=3
 build_src_filter= ${Heltec_lora32_v4.build_src_filter}
 lib_deps = ${Heltec_lora32_v4.lib_deps}