builtin,strconv: cleanup obsolete comments

Author: spytheman

vlib/builtin/string_charptr_byteptr_helpers.v

@@ -1,7 +1,5 @@
 module builtin
 
-// Note: this file will be removed soon
-
 // byteptr.vbytes() - makes a V []u8 structure from a C style memory buffer. Note: the data is reused, NOT copied!
 @[reused; unsafe]
 pub fn (data byteptr) vbytes(len int) []u8 {

vlib/strconv/format.md

@@ -3,7 +3,7 @@
 These are v implementations of the C language `printf` and `sprintf` functions.
 
 > **Note**
-> These functions are deprecated and will be removed soon. Use string interpolation instead.
+> These functions are platform dependent in C, but in V they are platform independent.
 
 ### v_sprintf