diff --git a/src/flb_sds.c b/src/flb_sds.c
index 1d8263b3432..4ac36ad22e8 100644
--- a/src/flb_sds.c
+++ b/src/flb_sds.c
@@ -331,106 +331,6 @@ flb_sds_t flb_sds_cat_utf8(flb_sds_t *sds, const char *str, int str_len)
     flb_sds_len_set(s, offset);
     s[head->len] = '\0';
     return s;
-
-
-
-    for (i = 0; i < str_len; i++) {
-        if (flb_sds_avail(s) < 8) {
-            tmp = flb_sds_increase(s, 8);
-            if (tmp == NULL) {
-                return NULL;
-            }
-            *sds = s = tmp;
-            head = FLB_SDS_HEADER(s);
-        }
-
-        c = (unsigned char)str[i];
-        if (c == '\\' || c == '"') {
-            s[head->len++] = '\\';
-            s[head->len++] = c;
-        }
-        else if (c >= '\b' && c <= '\r') {
-            s[head->len++] = '\\';
-            switch (c) {
-            case '\n':
-                s[head->len++] = 'n';
-                break;
-            case '\t':
-                s[head->len++] = 't';
-                break;
-            case '\b':
-                s[head->len++] = 'b';
-                break;
-            case '\f':
-                s[head->len++] = 'f';
-                break;
-            case '\r':
-                s[head->len++] = 'r';
-                break;
-            case '\v':
-                s[head->len++] = 'u';
-                s[head->len++] = '0';
-                s[head->len++] = '0';
-                s[head->len++] = '0';
-                s[head->len++] = 'b';
-                break;
-            }
-        }
-        else if (c < 32 || c == 0x7f) {
-            s[head->len++] = '\\';
-            s[head->len++] = 'u';
-            s[head->len++] = '0';
-            s[head->len++] = '0';
-            s[head->len++] = int2hex[ (unsigned char) ((c & 0xf0) >> 4)];
-            s[head->len++] = int2hex[ (unsigned char) (c & 0x0f)];
-        }
-        else if (c >= 0x80) {
-            hex_bytes = flb_utf8_len(str + i);
-            state = FLB_UTF8_ACCEPT;
-            cp = 0;
-            for (b = 0; b < hex_bytes; b++) {
-                p = (const unsigned char *) str + i + b;
-                if (p >= (unsigned char *) (str + str_len)) {
-                    break;
-                }
-                ret = flb_utf8_decode(&state, &cp, *p);
-                if (ret == 0) {
-                    break;
-                }
-            }
-
-            if (state != FLB_UTF8_ACCEPT) {
-                /* Invalid UTF-8 hex, just skip utf-8 bytes */
-                flb_warn("[pack] invalid UTF-8 bytes, skipping");
-                break;
-            }
-
-            s[head->len++] = '\\';
-            s[head->len++] = 'u';
-            if (cp > 0xFFFF) {
-                c = (unsigned char) ((cp & 0xf00000) >> 20);
-                if (c > 0) {
-                    s[head->len++] = int2hex[c];
-                }
-                c = (unsigned char) ((cp & 0x0f0000) >> 16);
-                if (c > 0) {
-                    s[head->len++] = int2hex[c];
-                }
-            }
-            s[head->len++] = int2hex[ (unsigned char) ((cp & 0xf000) >> 12)];
-            s[head->len++] = int2hex[ (unsigned char) ((cp & 0x0f00) >> 8)];
-            s[head->len++] = int2hex[ (unsigned char) ((cp & 0xf0) >> 4)];
-            s[head->len++] = int2hex[ (unsigned char) (cp & 0x0f)];
-            i += (hex_bytes - 1);
-        }
-        else {
-            s[head->len++] = c;
-        }
-    }
-
-    s[head->len] = '\0';
-
-    return s;
 }
 
 flb_sds_t flb_sds_printf(flb_sds_t *sds, const char *fmt, ...)