src/vs/workbench/api/browser/mainThreadEditors.ts/MainThreadTextEditors/$removeTextEditorDecorationType
class MainThreadTextEditors:	$removeTextEditorDecorationType(key: string): void {
		key = `${this._instanceId}-${key}`;
		delete this._registeredDecorationTypes[key];
		this._codeEditorService.removeDecorationType(key);
	}