1 files changed, 1 insertions, 11 deletions
diff --git a/sphinx/util/images.py b/sphinx/util/images.py
index 4cefe99d5..8471e56df 100644
--- a/sphinx/util/images.py
+++ b/sphinx/util/images.py
@@ -10,16 +10,12 @@
 
 import base64
 import imghdr
-import warnings
 from collections import OrderedDict
-from io import BytesIO
 from os import path
 from typing import IO, NamedTuple, Tuple
 
 import imagesize
 
-from sphinx.deprecation import RemovedInSphinx30Warning
-
 try:
     from PIL import Image
 except ImportError:
@@ -66,16 +62,10 @@ def guess_mimetype_for_stream(stream: IO, default: str = None) -> str:
         return default
 
 
-def guess_mimetype(filename: str = '', content: bytes = None, default: str = None) -> str:
+def guess_mimetype(filename: str = '', default: str = None) -> str:
     _, ext = path.splitext(filename.lower())
     if ext in mime_suffixes:
         return mime_suffixes[ext]
-    elif content:
-        # TODO: When the content argument is removed, make filename a required
-        # argument.
-        warnings.warn('The content argument of guess_mimetype() is deprecated.',
-                      RemovedInSphinx30Warning, stacklevel=2)
-        return guess_mimetype_for_stream(BytesIO(content), default=default)
     elif path.exists(filename):
         with open(filename, 'rb') as f:
             return guess_mimetype_for_stream(f, default=default)