diff --git a/builtin/string.v b/builtin/string.v
index 578fc4e3fc..1dc4734e2e 100644
--- a/builtin/string.v
+++ b/builtin/string.v
@@ -138,7 +138,6 @@ pub fn (s string) replace(rep, with string) string {
 	return tos(b, new_len)
 }
 
-// Casting to numbers (integers and floats)
 fn (s string) to_i() int {
 	return C.atoi(s.str)
 }
@@ -151,18 +150,6 @@ fn (s string) i32() int {
 	return s.to_i()
 }
 
-fn (s string) to_float() float {
-	return C.atof(s.str)
-}
-
-fn (s string) float() float {
-	return s.to_float()
-}
-
-fn (s string) f32() float {
-	return s.to_float()
-}
-
 // ==
 fn (s string) eq(a string) bool {
 	if isnil(s.str) {