esp32c2: Remove esp8684 alias

esptool/__init__.py

@@ -70,7 +70,6 @@
     FatalError,
     NotImplementedInROMError,
     flash_size_bytes,
-    format_chip_name,
 )
 
 
@@ -99,7 +98,7 @@ def main(argv=None, esp=None):
         "--chip",
         "-c",
         help="Target chip type",
-        type=format_chip_name,  # support ESP32-S2, etc.
+        type=lambda c: c.lower().replace("-", ""),  # support ESP32-S2, etc.
         choices=["auto"] + CHIP_LIST,
         default=os.environ.get("ESPTOOL_CHIP", "auto"),
     )

esptool/util.py

@@ -22,18 +22,6 @@ def mask_to_shift(mask):
     return shift
 
 
-def format_chip_name(c):
-    """Normalize chip name from user input"""
-    c = c.lower().replace("-", "")
-    if c == "esp8684":  # TODO: Delete alias, ESPTOOL-389
-        print(
-            "WARNING: Chip name ESP8684 is deprecated in favor of ESP32-C2 "
-            "and will be removed in a future release. Using ESP32-C2 instead."
-        )
-        return "esp32c2"
-    return c
-
-
 def div_roundup(a, b):
     """Return a/b rounded up to nearest integer,
     equivalent result to int(math.ceil(float(int(a)) / float(int(b))), only