diff --git a/default.go b/default.go
index 433371b..a9589ed 100644
--- a/default.go
+++ b/default.go
@@ -88,10 +88,6 @@ func SetString(key string, value string) {
 	defaultConfigManager.SetString(key, value)
 }
 
-func Delete(key string) {
-	defaultConfigManager.Delete(key)
-}
-
 func Sub(key string) *ConfigManager {
 	return defaultConfigManager.Sub(key)
 }
diff --git a/jety_test.go b/jety_test.go
index 8f68b6c..6271ad7 100644
--- a/jety_test.go
+++ b/jety_test.go
@@ -1555,81 +1555,6 @@ func TestPackageLevelGetInt64(t *testing.T) {
 	}
 }
 
-func TestDelete(t *testing.T) {
-	cm := NewConfigManager()
-	cm.SetDefault("keep", "yes")
-	cm.SetDefault("remove", "default")
-	cm.Set("remove", "override")
-
-	if !cm.IsSet("remove") {
-		t.Fatal("remove should be set before delete")
-	}
-
-	cm.Delete("remove")
-
-	if cm.IsSet("remove") {
-		t.Error("remove should not be set after delete")
-	}
-	if cm.Get("remove") != nil {
-		t.Error("Get(remove) should return nil after delete")
-	}
-	if cm.GetString("keep") != "yes" {
-		t.Error("keep should be unaffected by deleting remove")
-	}
-}
-
-func TestDeleteFromAllLayers(t *testing.T) {
-	dir := t.TempDir()
-	configFile := filepath.Join(dir, "config.toml")
-	if err := os.WriteFile(configFile, []byte(`filekey = "fromfile"`), 0o644); err != nil {
-		t.Fatal(err)
-	}
-
-	cm := NewConfigManager()
-	cm.SetConfigFile(configFile)
-	if err := cm.SetConfigType("toml"); err != nil {
-		t.Fatal(err)
-	}
-	cm.SetDefault("filekey", "default")
-	if err := cm.ReadInConfig(); err != nil {
-		t.Fatal(err)
-	}
-	cm.Set("filekey", "override")
-
-	if cm.GetString("filekey") != "override" {
-		t.Fatal("expected override value before delete")
-	}
-
-	cm.Delete("filekey")
-
-	if cm.IsSet("filekey") {
-		t.Error("filekey should not be set after delete from all layers")
-	}
-}
-
-func TestDeleteCaseInsensitive(t *testing.T) {
-	cm := NewConfigManager()
-	cm.Set("MyKey", "value")
-
-	cm.Delete("MYKEY")
-
-	if cm.IsSet("mykey") {
-		t.Error("delete should be case-insensitive")
-	}
-}
-
-func TestPackageLevelDelete(t *testing.T) {
-	defaultConfigManager = NewConfigManager()
-	Set("temp", "value")
-	if !IsSet("temp") {
-		t.Fatal("temp should be set")
-	}
-	Delete("temp")
-	if IsSet("temp") {
-		t.Error("temp should not be set after package-level Delete")
-	}
-}
-
 func TestSub(t *testing.T) {
 	dir := t.TempDir()
 	configFile := filepath.Join(dir, "config.toml")
diff --git a/setters.go b/setters.go
index 553ef66..ebaf3d9 100644
--- a/setters.go
+++ b/setters.go
@@ -28,19 +28,6 @@ func (c *ConfigManager) Set(key string, value any) {
 	c.combinedConfig[lower] = ConfigMap{Key: key, Value: value}
 }
 
-// Delete removes a key from all configuration layers (overrides, file,
-// defaults) and rebuilds the combined configuration. Environment variables
-// are not affected since they are loaded from the process environment.
-func (c *ConfigManager) Delete(key string) {
-	c.mutex.Lock()
-	lower := strings.ToLower(key)
-	delete(c.overrideConfig, lower)
-	delete(c.fileConfig, lower)
-	delete(c.defaultConfig, lower)
-	delete(c.combinedConfig, lower)
-	c.mutex.Unlock()
-}
-
 func (c *ConfigManager) SetDefault(key string, value any) {
 	c.mutex.Lock()
 	defer c.mutex.Unlock()