diff --git a/milkymist/clkfx/__init__.py b/milkymist/clkfx/__init__.py
deleted file mode 100644
index e90183ebe..000000000
--- a/milkymist/clkfx/__init__.py
+++ /dev/null
@@ -1,38 +0,0 @@
-from fractions import Fraction
-
-from migen.fhdl.structure import *
-
-class ClkFX:
-	def __init__(self, infreq, outfreq):
-		self.clkin = Signal()
-		self.clkout = Signal()
-		
-		ratio = Fraction(outfreq)/Fraction(infreq)
-		appr = ratio.limit_denominator(32)
-		m = appr.numerator
-		if m < 2 or m > 32:
-			raise OverflowError
-		d = appr.denominator
-		
-		in_period = float(Fraction(1000000000)/Fraction(infreq))
-		
-		self._inst = Instance("DCM_SP",
-			[("CLKFX", self.clkout)],
-			[("CLKIN", self.clkin),
-			("PSEN", BV(1)),
-			("RST", BV(1))],
-			[("CLKDV_DIVIDE", 2.0),
-			("CLKFX_DIVIDE", d),
-			("CLKFX_MULTIPLY", m),
-			("CLKIN_DIVIDE_BY_2", "FALSE"),
-			("CLKIN_PERIOD", in_period),
-			("CLKOUT_PHASE_SHIFT", "NONE"),
-			("CLK_FEEDBACK", "NONE"),
-			("DESKEW_ADJUST", "SYSTEM_SYNCHRONOUS"),
-			("DUTY_CYCLE_CORRECTION", "TRUE"),
-			("PHASE_SHIFT", 0),
-			("STARTUP_WAIT", "TRUE")]
-		)
-
-	def get_fragment(self):
-		return Fragment([self._inst.ins["PSEN"].eq(0), self._inst.ins["RST"].eq(0)], instances=[self._inst])