diff --git a/src/cmd/compile/internal/ir/bitset.go b/src/cmd/compile/internal/ir/bitset.go
index 0c7bd542f60..bae40058669 100644
--- a/src/cmd/compile/internal/ir/bitset.go
+++ b/src/cmd/compile/internal/ir/bitset.go
@@ -35,37 +35,3 @@ func (f *bitset16) set(mask uint16, b bool) {
 		*(*uint16)(f) &^= mask
 	}
 }
-
-type bitset32 uint32
-
-func (f *bitset32) set(mask uint32, b bool) {
-	if b {
-		*(*uint32)(f) |= mask
-	} else {
-		*(*uint32)(f) &^= mask
-	}
-}
-
-func (f bitset32) get2(shift uint8) uint8 {
-	return uint8(f>>shift) & 3
-}
-
-// set2 sets two bits in f using the bottom two bits of b.
-func (f *bitset32) set2(shift uint8, b uint8) {
-	// Clear old bits.
-	*(*uint32)(f) &^= 3 << shift
-	// Set new bits.
-	*(*uint32)(f) |= uint32(b&3) << shift
-}
-
-func (f bitset32) get3(shift uint8) uint8 {
-	return uint8(f>>shift) & 7
-}
-
-// set3 sets three bits in f using the bottom three bits of b.
-func (f *bitset32) set3(shift uint8, b uint8) {
-	// Clear old bits.
-	*(*uint32)(f) &^= 7 << shift
-	// Set new bits.
-	*(*uint32)(f) |= uint32(b&7) << shift
-}