diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25669250b5..3fee869fc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## Unreleased
 
+* The deprecated using of `data` argument now been removed.
 * The deprecated `proxies` argument has now been removed.
 * The deprecated `app` argument has now been removed.
 * The `URL.raw` property has now been removed.
diff --git a/docs/compatibility.md b/docs/compatibility.md
index e820a67b07..640f1d5ef4 100644
--- a/docs/compatibility.md
+++ b/docs/compatibility.md
@@ -86,8 +86,7 @@ And using `data=...` to send form data:
 httpx.post(..., data={"message": "Hello, world"})
 ```
 
-Using the `data=<text/byte content>` will raise a deprecation warning,
-and is expected to be fully removed with the HTTPX 1.0 release.
+Unlike `requests`, Using it as `data=<text/byte content>` wont work.
 
 ## Upload files
 
diff --git a/httpx/_content.py b/httpx/_content.py
index 786699f38f..5d7decf095 100644
--- a/httpx/_content.py
+++ b/httpx/_content.py
@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import inspect
-import warnings
 from json import dumps as json_dumps
 from typing import (
     Any,
@@ -9,7 +8,6 @@
     AsyncIterator,
     Iterable,
     Iterator,
-    Mapping,
 )
 from urllib.parse import urlencode
 
@@ -192,18 +190,6 @@ def encode_request(
     Handles encoding the given `content`, `data`, `files`, and `json`,
     returning a two-tuple of (<headers>, <stream>).
     """
-    if data is not None and not isinstance(data, Mapping):
-        # We prefer to separate `content=<bytes|str|byte iterator|bytes aiterator>`
-        # for raw request content, and `data=<form data>` for url encoded or
-        # multipart form content.
-        #
-        # However for compat with requests, we *do* still support
-        # `data=<bytes...>` usages. We deal with that case here, treating it
-        # as if `content=<...>` had been supplied instead.
-        message = "Use 'content=<...>' to upload raw bytes/text content."
-        warnings.warn(message, DeprecationWarning)
-        return encode_content(data)
-
     if content is not None:
         return encode_content(content)
     elif files: