Only code clean up to remove many warnings. There should be no changes

to program operation.

qcpaxistickerhex.cpp

@@ -3,6 +3,9 @@
 
 QString QCPAxisTickerHex::getTickLabel (double tick, const QLocale &locale, QChar formatChar, int precision)
 {
+    Q_UNUSED(locale);
+    Q_UNUSED(formatChar);
+    Q_UNUSED(precision);
     int64_t hexVal = static_cast<int64_t>(tick);
     return QString::number(hexVal, 16);
 }