diff --git a/src/IO/ReadHelpers.h b/src/IO/ReadHelpers.h
index a7c876ed32b..b580d80c244 100644
--- a/src/IO/ReadHelpers.h
+++ b/src/IO/ReadHelpers.h
@@ -1072,33 +1072,6 @@ inline void readCSVSimple(T & x, ReadBuffer & buf, bool read_bool_as_uint8 = fal
         assertChar(maybe_quote, buf);
 }
 
-/*
-inline void readCSVSimple(UInt8 & x, ReadBuffer & buf)
-{
-    if (buf.eof())
-        throwReadAfterEOF();
-
-    char maybe_quote = *buf.position();
-
-    if (maybe_quote == '\'' || maybe_quote == '\"')
-        ++buf.position();
-
-    if (*buf.position() == 't' || *buf.position() == 'f')
-    {
-        bool tmp = false;
-        readBoolTextWord(tmp, buf);
-        x = tmp ? 1 : 0;
-    }
-    else
-    {
-        readText(x, buf);
-    }
-
-    if (maybe_quote == '\'' || maybe_quote == '\"')
-        assertChar(maybe_quote, buf);
-}
-*/
-
 template <typename T>
 inline std::enable_if_t<is_arithmetic_v<T>, void>
 readCSV(T & x, ReadBuffer & buf, bool read_bool_as_uint8 = false) { readCSVSimple(x, buf, read_bool_as_uint8); }