string_util: remove ShiftJIS/CP1252 conversion function

We always use unicode internally. Any dirty work of conversion with other codec should be handled by frontend framework (Qt). Further more, ShiftJIS/CP1252 are not special (they are not code set used by 3ds, or any guest/host dependencies we have), so there is no reason to specifically include them

src/common/string_util.cpp

@@ -261,14 +261,6 @@ std::wstring UTF8ToUTF16W(const std::string& input) {
     return CPToUTF16(CP_UTF8, input);
 }
 
-std::string SHIFTJISToUTF8(const std::string& input) {
-    return UTF16ToUTF8(CPToUTF16(932, input));
-}
-
-std::string CP1252ToUTF8(const std::string& input) {
-    return UTF16ToUTF8(CPToUTF16(1252, input));
-}
-
 #else
 
 template <typename T>
@@ -368,17 +360,6 @@ std::string UTF16ToUTF8(const std::u16string& input) {
     return CodeToUTF8("UTF-16LE", input);
 }
 
-std::string CP1252ToUTF8(const std::string& input) {
-    // return CodeToUTF8("CP1252//TRANSLIT", input);
-    // return CodeToUTF8("CP1252//IGNORE", input);
-    return CodeToUTF8("CP1252", input);
-}
-
-std::string SHIFTJISToUTF8(const std::string& input) {
-    // return CodeToUTF8("CP932", input);
-    return CodeToUTF8("SJIS", input);
-}
-
 #endif
 
 std::string StringFromFixedZeroTerminatedBuffer(const char* buffer, std::size_t max_len) {

src/common/string_util.h

@@ -72,9 +72,6 @@ std::string ReplaceAll(std::string result, const std::string& src, const std::st
 std::string UTF16ToUTF8(const std::u16string& input);
 std::u16string UTF8ToUTF16(const std::string& input);
 
-std::string CP1252ToUTF8(const std::string& str);
-std::string SHIFTJISToUTF8(const std::string& str);
-
 #ifdef _WIN32
 std::string UTF16ToUTF8(const std::wstring& input);
 std::wstring UTF8ToUTF16W(const std::string& str);