From 14ea50d4c1bfe2ebf5dc2e1d549a7c77818c6329 Mon Sep 17 00:00:00 2001
From: Darren Burns <darrenb900@gmail.com>
Date: Thu, 13 Oct 2022 12:19:07 +0100
Subject: [PATCH] Remove some unused exceptions

---
 src/textual/color.py        | 1 -
 src/textual/dom.py          | 4 ----
 src/textual/message_pump.py | 4 ----
 3 files changed, 9 deletions(-)

diff --git a/src/textual/color.py b/src/textual/color.py
index d2645b8b4..16108e71d 100644
--- a/src/textual/color.py
+++ b/src/textual/color.py
@@ -528,7 +528,6 @@ class Color(NamedTuple):
 # Color constants
 WHITE = Color(255, 255, 255)
 BLACK = Color(0, 0, 0)
-TRANSPARENT = Color(0, 0, 0, 0)
 
 
 def rgb_to_lab(rgb: Color) -> Lab:
diff --git a/src/textual/dom.py b/src/textual/dom.py
index 798b04d45..f3234ac86 100644
--- a/src/textual/dom.py
+++ b/src/textual/dom.py
@@ -75,10 +75,6 @@ class NoScreen(DOMError):
     pass
 
 
-class NoParent(Exception):
-    pass
-
-
 @rich.repr.auto
 class DOMNode(MessagePump):
     """The base class for object that can be in the Textual DOM (App and Widget)"""
diff --git a/src/textual/message_pump.py b/src/textual/message_pump.py
index 4124f66ec..23bd8a873 100644
--- a/src/textual/message_pump.py
+++ b/src/textual/message_pump.py
@@ -29,10 +29,6 @@ if TYPE_CHECKING:
     from .app import App
 
 
-class NoParent(Exception):
-    pass
-
-
 class CallbackError(Exception):
     pass