remove unused ragestring function that produces coverity defect

src/RageUtil/Misc/RageString.cpp

@@ -1,4 +1,4 @@
-#include "Etterna/Globals/global.h"
+#include "Etterna/Globals/global.h"
 #include "RageString.h"
 #include "RageUnicode.h"
 #include <algorithm>
@@ -46,30 +46,6 @@ Rage::ends_with(std::string const& source, std::string const& target)
 	return Rage::tail(source, target.size()) == target;
 }
 
-std::string
-Rage::hexify(wchar_t const src, unsigned int dstlen)
-{
-	static char const alphabet[] = "0123456789abcdef";
-
-	std::stringstream builder;
-
-	unsigned int i = 0;
-	wchar_t const* ptr = &src;
-
-	while (*ptr && (2 * i) + 1 < dstlen) {
-		builder << alphabet[*ptr / 16];
-		builder << alphabet[*ptr % 16];
-		++ptr;
-		++i;
-	}
-
-	std::string setup{ builder.str() };
-	while (setup.size() < dstlen) {
-		setup = '0' + setup;
-	}
-	return setup;
-}
-
 void
 Rage::replace(std::string& target, char from, char to)
 {
@@ -532,4 +508,4 @@ Rage::make_lower(std::string const& source)
 	::make_lower(&buffer[0], source.size());
 
 	return std::string{ buffer.begin(), buffer.end() - 1 };
-}
+}