remove unused StringUtil::hasUtf8()

If needed StringUtil::isValidUTF8() could replace it.

mythtv/libs/libmythbase/stringutil.cpp

@@ -131,50 +131,3 @@ bool StringUtil::isValidUTF8(const QByteArray& data)
 
     return true;
 }
-
-/**
- * \brief Guess whether a string is UTF-8
- *
- * \note  This does not attempt to \e validate the whole string.
- *        It just checks if it has any UTF-8 sequences in it.
- *
- *  \todo FIXME? skips first byte, not sure the second to last if statement makes sense
- */
-
-bool StringUtil::hasUtf8(const char *str)
-{
-    const unsigned char *c = (unsigned char *) str;
-
-    while (*c++)
-    {
-        // ASCII is < 0x80.
-        // 0xC2..0xF4 is probably UTF-8.
-        // Anything else probably ISO-8859-1 (Latin-1, Unicode)
-
-        if (*c > 0xC1 && *c < 0xF5)
-        {
-            int bytesToCheck = 2;  // Assume  0xC2-0xDF (2 byte sequence)
-
-            if (*c > 0xDF)         // Maybe   0xE0-0xEF (3 byte sequence)
-                ++bytesToCheck;
-            if (*c > 0xEF)         // Matches 0xF0-0xF4 (4 byte sequence)
-                ++bytesToCheck;
-
-            while (bytesToCheck--)
-            {
-                ++c;
-
-                if (! *c)                    // String ended in middle
-                    return false;            // Not valid UTF-8
-
-                if (*c < 0x80 || *c > 0xBF)  // Bad UTF-8 sequence
-                    break;                   // Keep checking in outer loop
-            }
-
-            if (!bytesToCheck)  // Have checked all the bytes in the sequence
-                return true;    // Hooray! We found valid UTF-8!
-        }
-    }
-
-    return false;
-}

mythtv/libs/libmythbase/stringutil.h

@@ -15,8 +15,6 @@ inline QString indentSpaces(unsigned int level, unsigned int size = 4)
     return QString(level * size, QChar(' '));
 }
 
-MBASE_PUBLIC bool hasUtf8(const char *str); // unused
-
 /**
 This is equivalent to QVariant(bool).toString()
 */