diff --git a/eeschema/class_libentry.cpp b/eeschema/class_libentry.cpp
index 5acb30f193..9562f7c019 100644
--- a/eeschema/class_libentry.cpp
+++ b/eeschema/class_libentry.cpp
@@ -64,9 +64,7 @@ int LIB_PART::m_subpartFirstId = 'A';
 
 LIB_ALIAS::LIB_ALIAS( const wxString& aName, LIB_PART* aRootPart ) :
     EDA_ITEM( LIB_ALIAS_T ),
-    shared( aRootPart ),
-    tmpUnit( 0 ),
-    tmpConversion( 0 )
+    shared( aRootPart )
 {
     SetName( aName );
 }
@@ -74,9 +72,7 @@ LIB_ALIAS::LIB_ALIAS( const wxString& aName, LIB_PART* aRootPart ) :
 
 LIB_ALIAS::LIB_ALIAS( const LIB_ALIAS& aAlias, LIB_PART* aRootPart ) :
     EDA_ITEM( aAlias ),
-    shared( aRootPart ),
-    tmpUnit( 0 ),
-    tmpConversion( 0 )
+    shared( aRootPart )
 {
     name   = aAlias.name;
 
@@ -931,45 +927,6 @@ LIB_FIELD& LIB_PART::GetFootprintField()
 }
 
 
-bool LIB_PART::SaveDateAndTime( OUTPUTFORMATTER& aFormatter )
-{
-    int year, mon, day, hour, min, sec;
-
-    if( m_dateLastEdition == 0 )
-        return true;
-
-    sec  = m_dateLastEdition & 63;
-    min  = ( m_dateLastEdition >> 6 ) & 63;
-    hour = ( m_dateLastEdition >> 12 ) & 31;
-    day  = ( m_dateLastEdition >> 17 ) & 31;
-    mon  = ( m_dateLastEdition >> 22 ) & 15;
-    year = ( m_dateLastEdition >> 26 ) + 1990;
-
-    aFormatter.Print( 0, "Ti %d/%d/%d %d:%d:%d\n", year, mon, day, hour, min, sec );
-
-    return true;
-}
-
-
-bool LIB_PART::LoadDateAndTime( char* aLine )
-{
-    int   year, mon, day, hour, min, sec;
-
-    year = mon = day = hour = min = sec = 0;
-    strtok( aLine, " \r\t\n" );
-    strtok( NULL, " \r\t\n" );
-
-    if( sscanf( aLine, "%d/%d/%d %d:%d:%d", &year, &mon, &day, &hour, &min, &sec ) != 6 )
-        return false;
-
-    m_dateLastEdition = ( sec & 63 ) + ( ( min & 63 ) << 6 ) +
-                     ( ( hour & 31 ) << 12 ) + ( ( day & 31 ) << 17 ) +
-                     ( ( mon & 15 ) << 22 ) + ( ( year - 1990 ) << 26 );
-
-    return true;
-}
-
-
 void LIB_PART::SetOffset( const wxPoint& aOffset )
 {
     for( LIB_ITEM& item : m_drawings )
diff --git a/eeschema/class_libentry.h b/eeschema/class_libentry.h
index dcca4e029b..0733c1f76e 100644
--- a/eeschema/class_libentry.h
+++ b/eeschema/class_libentry.h
@@ -87,9 +87,6 @@ protected:
     wxString        keyWords;       ///< keyword list (used for search for parts by keyword)
     wxString        docFileName;    ///< Associate doc file name
 
-    int             tmpUnit;        ///< Temporary unit designator (used for rendering)
-    int             tmpConversion;  ///< Temporary conversion designator (used for rendering)
-
 public:
     LIB_ALIAS( const wxString& aName, LIB_PART* aRootComponent );
     LIB_ALIAS( const LIB_ALIAS& aAlias, LIB_PART* aRootComponent = NULL );
@@ -174,12 +171,6 @@ public:
      */
     wxString GetUnitReference( int aUnit ) override;
 
-    /**
-     * A temporary conversion (deMorgan) designation for rendering, preview, etc.
-     */
-    void SetTmpConversion( int aConversion ) { tmpConversion = aConversion; }
-    int GetTmpConversion() { return tmpConversion; }
-
     /**
      * KEEPCASE sensitive comparison of the part entry name.
      */
@@ -272,8 +263,6 @@ class LIB_PART : public EDA_ITEM
 private:
     void deleteAllFields();
 
-
-
 public:
 
     LIB_PART( const wxString& aName, PART_LIB* aLibrary = NULL );
@@ -377,26 +366,6 @@ public:
         return GetUnitBoundingBox( 0, 0 );
     }
 
-    /**
-     * Write the date and time of part to \a aFile in the format:
-     * "Ti yy/mm/jj hh:mm:ss"
-     *
-     * @param aFormatter A reference to an #OUTPUTFORMATTER object containing the
-     *                   output format to write to.
-     * @return True if the date and time were successfully written to \a aFormatter.
-     */
-    bool SaveDateAndTime( OUTPUTFORMATTER& aFormatter );
-
-    bool LoadDateAndTime( char* aLine );
-
-    /**
-     * Write the data structures out to \a aFormatter in the part library "*.lib" format.
-     *
-     * @param aFormatter A reference to an OUTPUTFORMATTER to write to.
-     * @return True if success writing else false.
-     */
-    bool Save( OUTPUTFORMATTER& aFormatter );
-
     bool IsPower() const  { return m_options == ENTRY_POWER; }
     bool IsNormal() const { return m_options == ENTRY_NORMAL; }