Don't use deprecated function in stc sample

Call to deprecated wxStyledTextCtrl::SetStyleBits() function can be omitted because underlying SCI_SETSTYLEBITS API is not operational anymore.

See #17671.

samples/stc/edit.cpp

@@ -133,9 +133,6 @@ Edit::Edit (wxWindow *parent, wxWindowID id,
     // initialize language
     m_language = NULL;
 
-    // Use all the bits in the style byte as styles, not indicators.
-    SetStyleBits(8);
-    
     // default font for all styles
     SetViewEOL (g_CommonPrefs.displayEOLEnable);
     SetIndentationGuides (g_CommonPrefs.indentGuideEnable);