diff --git a/mibuild/altera/_iostd.py b/mibuild/altera/_iostd.py
deleted file mode 100644
index 5978300bf..000000000
--- a/mibuild/altera/_iostd.py
+++ /dev/null
@@ -1,91 +0,0 @@
-'''ALTERA I/O-Standards
-'''
-import collections
-from mibuild.generic_platform import IOStandard
-
-__all__ = ['IOSTD']
-
-_LVTTL = collections.namedtuple(
-    'V',
-    'level1V8 level2V5 level3V0 level3V3')(
-        IOStandard('1.8-V'),
-        IOStandard('2.5-V'),
-        IOStandard('3.0-V LVTTL'),
-        IOStandard('3.3-V LVTTL'))
-
-_LVCMOS = collections.namedtuple(
-    'V',
-    'level1V2 level1V5 level1V8 level2V5 level3V0 level3V3')(
-        IOStandard('1.3 V'),
-        IOStandard('1.5 V'),
-        IOStandard('1.8 V'),
-        IOStandard('2.5 V'),
-        IOStandard('3.0-V LVCMOS'),
-        IOStandard('3.3-V LVCMOS'))
-
-_SSTL = collections.namedtuple(
-    'V',
-    'level1V5ClassI level1V5ClassII '
-    'level1V8ClassI level1V8ClassII '
-    'level2V0ClassI level2V0ClassII')(
-        IOStandard('SSTL-15 Class I'),
-        IOStandard('SSTL-15 Class II'),
-        IOStandard('SSTL-18 Class I'),
-        IOStandard('SSTL-18 Class II'),
-        IOStandard('SSTL-2 Class I'),
-        IOStandard('SSTL-2 Class II'))
-
-_HSTL = collections.namedtuple(
-    'V',
-    'level1V2ClassI level1V2ClassII level1V5ClassI level1V5ClassII '
-    'level1V8ClassI level1V8ClassII')(
-        IOStandard('1.2-V HSTL Class I'),
-        IOStandard('1.2-V HSTL Class II'),
-        IOStandard('HSTL Class I'),
-        IOStandard('HSTL Class II'),
-        IOStandard('1.8-V HSTL Class I'),
-        IOStandard('1.8-V HSTL Class II'))
-
-_DiffSSTL = collections.namedtuple(
-    'V',
-    'level1V5 level1V8 level2V0')(
-        IOStandard('Differential 1.5-V SSTL'),
-        IOStandard('Differential 1.8-V SSTL'),
-        IOStandard('Differential SSTL-2'))
-
-_DiffHSTL = collections.namedtuple(
-    'V',
-    'level1V2 level1V5 level1V8')(
-        IOStandard('Differential 1.2-V HSTL'),
-        IOStandard('Differential 1.5-V HSTL'),
-        IOStandard('Differential 1.8-V HSTL'))
-
-_PCML = collections.namedtuple(
-    'V',
-    'level1V2 level1V4 level1V5 level2V5')(
-        IOStandard('1.2-V PCML'),
-        IOStandard('1.4-V PCML'),
-        IOStandard('1.5-V PCML'),
-        IOStandard('2.5-V PCML'))
-
-IOSTD = collections.namedtuple(
-    'CONST',
-    'LVTTL LVCMOS PCI PCIX SSTL HSTL DiffSSTL DiffHSTL '
-    'LVDS RSDS miniLVDS LVPECL DiffLVPECL BLVDS PCML DiffPCML HCSL')(
-        _LVTTL,
-        _LVCMOS,
-        IOStandard('3.0-V PCI'),
-        IOStandard('3.0-V PCI-X'),
-        _SSTL,
-        _HSTL,
-        _DiffSSTL,
-        _DiffHSTL,
-        IOStandard('LVDS'),
-        IOStandard('RSDS'),
-        IOStandard('mini-LVDS'),
-        IOStandard('LVPECL'),
-        IOStandard('Differential LVPECL'),
-        IOStandard('BLVDS'),
-        _PCML,
-        IOStandard('Differential PCML'),
-        IOStandard('HCSL'))