diff --git a/src/common/string_util.cpp b/src/common/string_util.cpp
index c93418dbb..541a2bf4e 100644
--- a/src/common/string_util.cpp
+++ b/src/common/string_util.cpp
@@ -6,7 +6,6 @@
 #include <cctype>
 #include <codecvt>
 #include <cstdlib>
-#include <iomanip>
 #include <locale>
 #include <sstream>
 #include "common/common_paths.h"
@@ -33,24 +32,6 @@ std::string ToUpper(std::string str) {
     return str;
 }
 
-// For Debugging. Read out an u8 array.
-std::string ArrayToString(const u8* data, std::size_t size, int line_len, bool spaces) {
-    std::ostringstream oss;
-    oss << std::setfill('0') << std::hex;
-
-    for (int line = 0; size; ++data, --size) {
-        oss << std::setw(2) << (int)*data;
-
-        if (line_len == ++line) {
-            oss << '\n';
-            line = 0;
-        } else if (spaces)
-            oss << ' ';
-    }
-
-    return oss.str();
-}
-
 // Turns "  hej " into "hej". Also handles tabs.
 std::string StripSpaces(const std::string& str) {
     const std::size_t s = str.find_first_not_of(" \t\r\n");
diff --git a/src/common/string_util.h b/src/common/string_util.h
index 38e457ae9..d8fa4053e 100644
--- a/src/common/string_util.h
+++ b/src/common/string_util.h
@@ -17,8 +17,6 @@ std::string ToLower(std::string str);
 /// Make a string uppercase
 std::string ToUpper(std::string str);
 
-std::string ArrayToString(const u8* data, std::size_t size, int line_len = 20, bool spaces = true);
-
 std::string StripSpaces(const std::string& s);
 std::string StripQuotes(const std::string& s);