Fix minor warnings

eeschema/eeschema_config.cpp

@@ -460,8 +460,6 @@ static const wxString RepeatStepYEntry =            "RepeatStepY";
 static const wxString RepeatLabelIncrementEntry =   "RepeatLabelIncrement";
 
 // Library editor wxConfig entry names.
-static const wxChar lastLibExportPathEntry[] =      wxT( "LastLibraryExportPath" );
-static const wxChar lastLibImportPathEntry[] =      wxT( "LastLibraryImportPath" );
 static const wxChar defaultPinNumSizeEntry[] =      wxT( "LibeditPinNumSize" );
 static const wxChar defaultPinNameSizeEntry[] =     wxT( "LibeditPinNameSize" );
 static const wxChar DefaultPinLengthEntry[] =       wxT( "DefaultPinLength" );

eeschema/project_rescue.h

@@ -309,7 +309,6 @@ class LEGACY_RESCUER : public RESCUER
 {
 private:
     std::unique_ptr<PART_LIB> m_rescue_lib;
-    PART_LIBS* m_libs;
 
 public:
     LEGACY_RESCUER( SCH_EDIT_FRAME& aEditFrame, PROJECT& aProject ) :

eeschema/widgets/widget_eeschema_color_config.h

@@ -43,7 +43,6 @@ class WIDGET_EESCHEMA_COLOR_CONFIG : public wxPanel
 {
 private:
     EDA_DRAW_FRAME*         m_drawFrame;
-    wxColourPickerCtrl*     m_SelBgColor;
     wxBoxSizer*             m_mainBoxSizer;
 
     // Creates the controls and sizers