diff --git a/esphome/components/esp8266/boards.py b/esphome/components/esp8266/boards.py
index c49aae4ffa..410e934615 100644
--- a/esphome/components/esp8266/boards.py
+++ b/esphome/components/esp8266/boards.py
@@ -206,61 +206,3 @@ ESP8266_BOARD_PINS = {
     "wio_node": {"LED": 2, "GROVE": 15, "D0": 3, "D1": 5, "BUTTON": 0},
     "xinabox_cw01": {"SDA": 2, "SCL": 14, "LED": 5, "LED_RED": 12, "LED_GREEN": 13},
 }
-
-FLASH_SIZE_1_MB = 2 ** 20
-FLASH_SIZE_512_KB = FLASH_SIZE_1_MB // 2
-FLASH_SIZE_2_MB = 2 * FLASH_SIZE_1_MB
-FLASH_SIZE_4_MB = 4 * FLASH_SIZE_1_MB
-FLASH_SIZE_16_MB = 16 * FLASH_SIZE_1_MB
-
-ESP8266_FLASH_SIZES = {
-    "d1": FLASH_SIZE_4_MB,
-    "d1_mini": FLASH_SIZE_4_MB,
-    "d1_mini_lite": FLASH_SIZE_1_MB,
-    "d1_mini_pro": FLASH_SIZE_16_MB,
-    "esp01": FLASH_SIZE_512_KB,
-    "esp01_1m": FLASH_SIZE_1_MB,
-    "esp07": FLASH_SIZE_4_MB,
-    "esp12e": FLASH_SIZE_4_MB,
-    "esp210": FLASH_SIZE_4_MB,
-    "esp8285": FLASH_SIZE_1_MB,
-    "esp_wroom_02": FLASH_SIZE_2_MB,
-    "espduino": FLASH_SIZE_4_MB,
-    "espectro": FLASH_SIZE_4_MB,
-    "espino": FLASH_SIZE_4_MB,
-    "espinotee": FLASH_SIZE_4_MB,
-    "espmxdevkit": FLASH_SIZE_1_MB,
-    "espresso_lite_v1": FLASH_SIZE_4_MB,
-    "espresso_lite_v2": FLASH_SIZE_4_MB,
-    "gen4iod": FLASH_SIZE_512_KB,
-    "heltec_wifi_kit_8": FLASH_SIZE_4_MB,
-    "huzzah": FLASH_SIZE_4_MB,
-    "inventone": FLASH_SIZE_4_MB,
-    "modwifi": FLASH_SIZE_2_MB,
-    "nodemcu": FLASH_SIZE_4_MB,
-    "nodemcuv2": FLASH_SIZE_4_MB,
-    "oak": FLASH_SIZE_4_MB,
-    "phoenix_v1": FLASH_SIZE_4_MB,
-    "phoenix_v2": FLASH_SIZE_4_MB,
-    "sonoff_basic": FLASH_SIZE_1_MB,
-    "sonoff_s20": FLASH_SIZE_1_MB,
-    "sonoff_sv": FLASH_SIZE_1_MB,
-    "sonoff_th": FLASH_SIZE_1_MB,
-    "sparkfunBlynk": FLASH_SIZE_4_MB,
-    "thing": FLASH_SIZE_512_KB,
-    "thingdev": FLASH_SIZE_512_KB,
-    "wifi_slot": FLASH_SIZE_1_MB,
-    "wifiduino": FLASH_SIZE_4_MB,
-    "wifinfo": FLASH_SIZE_1_MB,
-    "wio_link": FLASH_SIZE_4_MB,
-    "wio_node": FLASH_SIZE_4_MB,
-    "xinabox_cw01": FLASH_SIZE_4_MB,
-}
-
-ESP8266_LD_SCRIPTS = {
-    FLASH_SIZE_512_KB: ("eagle.flash.512k0.ld", "eagle.flash.512k.ld"),
-    FLASH_SIZE_1_MB: ("eagle.flash.1m0.ld", "eagle.flash.1m.ld"),
-    FLASH_SIZE_2_MB: ("eagle.flash.2m.ld", "eagle.flash.2m.ld"),
-    FLASH_SIZE_4_MB: ("eagle.flash.4m.ld", "eagle.flash.4m.ld"),
-    FLASH_SIZE_16_MB: ("eagle.flash.16m.ld", "eagle.flash.16m14m.ld"),
-}