Remove the Error data sub class (#2529)

This was added at one point for the reimplementation of legacy workflows
and started out as an internal exception wrapper but was ultimately
never used.

aiida/orm/nodes/data/__init__.py

@@ -18,7 +18,6 @@
 from .cif import CifData
 from .code import Code
 from .data import Data
-from .error import Error
 from .float import Float
 from .folder import FolderData
 from .frozendict import FrozenDict
@@ -33,5 +32,5 @@
 from .upf import UpfData
 
 __all__ = ('Data', 'BaseType', 'ArrayData', 'BandsData', 'KpointsData', 'ProjectionData', 'TrajectoryData', 'XyData',
-           'Bool', 'CifData', 'Code', 'Error', 'Float', 'FolderData', 'FrozenDict', 'Int', 'List', 'OrbitalData',
+           'Bool', 'CifData', 'Code', 'Float', 'FolderData', 'FrozenDict', 'Int', 'List', 'OrbitalData',
            'ParameterData', 'RemoteData', 'SinglefileData', 'Str', 'StructureData', 'UpfData')

setup.json

@@ -152,7 +152,6 @@
       "bool = aiida.orm.nodes.data.bool:Bool",
       "cif = aiida.orm.nodes.data.cif:CifData",
       "code = aiida.orm.nodes.data.code:Code",
-      "error = aiida.orm.nodes.data.error:Error",
       "float = aiida.orm.nodes.data.float:Float",
       "folder = aiida.orm.nodes.data.folder:FolderData",
       "frozendict = aiida.orm.nodes.data.frozendict:FrozenDict",