diff --git a/homeassistant/components/conversation/__init__.py b/homeassistant/components/conversation/__init__.py
index 14c5244c18b..25aaf6df290 100644
--- a/homeassistant/components/conversation/__init__.py
+++ b/homeassistant/components/conversation/__init__.py
@@ -4,7 +4,6 @@ from __future__ import annotations
 
 from collections.abc import Callable
 import logging
-import re
 from typing import Literal
 
 from hassil.recognize import RecognizeResult
@@ -91,8 +90,6 @@ __all__ = [
 
 _LOGGER = logging.getLogger(__name__)
 
-REGEX_TYPE = type(re.compile(""))
-
 SERVICE_PROCESS_SCHEMA = vol.Schema(
     {
         vol.Required(ATTR_TEXT): cv.string,
diff --git a/homeassistant/components/conversation/util.py b/homeassistant/components/conversation/util.py
deleted file mode 100644
index 4326c95cb66..00000000000
--- a/homeassistant/components/conversation/util.py
+++ /dev/null
@@ -1,37 +0,0 @@
-"""Util for Conversation."""
-
-from __future__ import annotations
-
-import re
-
-
-def create_matcher(utterance: str) -> re.Pattern[str]:
-    """Create a regex that matches the utterance."""
-    # Split utterance into parts that are type: NORMAL, GROUP or OPTIONAL
-    # Pattern matches (GROUP|OPTIONAL): Change light to [the color] {name}
-    parts = re.split(r"({\w+}|\[[\w\s]+\] *)", utterance)
-    # Pattern to extract name from GROUP part. Matches {name}
-    group_matcher = re.compile(r"{(\w+)}")
-    # Pattern to extract text from OPTIONAL part. Matches [the color]
-    optional_matcher = re.compile(r"\[([\w ]+)\] *")
-
-    pattern = ["^"]
-    for part in parts:
-        group_match = group_matcher.match(part)
-        optional_match = optional_matcher.match(part)
-
-        # Normal part
-        if group_match is None and optional_match is None:
-            pattern.append(part)
-            continue
-
-        # Group part
-        if group_match is not None:
-            pattern.append(rf"(?P<{group_match.groups()[0]}>[\w ]+?)\s*")
-
-        # Optional part
-        elif optional_match is not None:
-            pattern.append(rf"(?:{optional_match.groups()[0]} *)?")
-
-    pattern.append("$")
-    return re.compile("".join(pattern), re.IGNORECASE)
diff --git a/tests/components/conversation/test_util.py b/tests/components/conversation/test_util.py
deleted file mode 100644
index 72a334232c1..00000000000
--- a/tests/components/conversation/test_util.py
+++ /dev/null
@@ -1,56 +0,0 @@
-"""Test the conversation utils."""
-
-from homeassistant.components.conversation.util import create_matcher
-
-
-def test_create_matcher() -> None:
-    """Test the create matcher method."""
-    # Basic sentence
-    pattern = create_matcher("Hello world")
-    assert pattern.match("Hello world") is not None
-
-    # Match a part
-    pattern = create_matcher("Hello {name}")
-    match = pattern.match("hello world")
-    assert match is not None
-    assert match.groupdict()["name"] == "world"
-    no_match = pattern.match("Hello world, how are you?")
-    assert no_match is None
-
-    # Optional and matching part
-    pattern = create_matcher("Turn on [the] {name}")
-    match = pattern.match("turn on the kitchen lights")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"
-    match = pattern.match("turn on kitchen lights")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"
-    match = pattern.match("turn off kitchen lights")
-    assert match is None
-
-    # Two different optional parts, 1 matching part
-    pattern = create_matcher("Turn on [the] [a] {name}")
-    match = pattern.match("turn on the kitchen lights")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"
-    match = pattern.match("turn on kitchen lights")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"
-    match = pattern.match("turn on a kitchen light")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen light"
-
-    # Strip plural
-    pattern = create_matcher("Turn {name}[s] on")
-    match = pattern.match("turn kitchen lights on")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen light"
-
-    # Optional 2 words
-    pattern = create_matcher("Turn [the great] {name} on")
-    match = pattern.match("turn the great kitchen lights on")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"
-    match = pattern.match("turn kitchen lights on")
-    assert match is not None
-    assert match.groupdict()["name"] == "kitchen lights"