Fix uncaught exception in footprint and symbol library table parsers.

Fixes Coverity CID 154580
Fixes Coverity CID 154581
Fixes Coverity CID 154582
Fixes Coverity CID 154583
Fixes Coverity CID 154584
Fixes Coverity CID 154585

common/lib_table_base.cpp

@@ -81,7 +81,6 @@ const wxString LIB_TABLE_ROW::GetFullURI( bool aSubstituted ) const
 
 
 void LIB_TABLE_ROW::Format( OUTPUTFORMATTER* out, int nestLevel ) const
-    throw( IO_ERROR, boost::interprocess::lock_exception )
 {
     // In Kicad, we save path and file names using the Unix notation (separator = '/')
     // So ensure separator is always '/' is saved URI string
@@ -99,7 +98,6 @@ void LIB_TABLE_ROW::Format( OUTPUTFORMATTER* out, int nestLevel ) const
 
 
 void LIB_TABLE_ROW::Parse( std::unique_ptr< LIB_TABLE_ROW >& aRow, LIB_TABLE_LEXER* in )
-    throw( IO_ERROR, PARSE_ERROR )
 {
     /*
      * (lib (name NICKNAME)(descr DESCRIPTION)(type TYPE)(full_uri FULL_URI)(options OPTIONS))