solenv: installer: remove DONT_DELETE style

This style was only handled in the installer code for registry items,
but in scp2 it was only set for files, so effectively it was unused.

Change-Id: I197eeded29648aee2489e302f7b5e48bf13a545c

solenv/bin/modules/installer/globals.pm

@@ -256,7 +256,6 @@ BEGIN
     %allcabinetassigns = ();
     %cabfilecounter = ();
     %lastsequence = ();
-    %dontdeletecomponents = ();
     %allcalculated_guids = ();
     %calculated_component_guids = ();
     %all_english_languagestrings = ();

solenv/bin/modules/installer/windows/component.pm

@@ -249,9 +249,6 @@ sub get_registry_component_attributes
     # Setting msidbComponentAttributes64bit for 64 bit shell extension in 32 bit installer, too
     if ( $componentname =~ m/winexplorerext_x64/ ) { $attributes |= 256; }
 
-    # Setting msidbComponentAttributesPermanent
-    if ( exists($installer::globals::dontdeletecomponents{$componentname}) ) { $attributes |= 16; }
-
     return $attributes;
 }
 

solenv/bin/modules/installer/windows/registry.pm

@@ -363,11 +363,8 @@ sub create_registry_table
                 push(@{$allregistrycomponentsref}, $registry{'Component_'});
             }
 
-            # Collecting all components with DONT_DELETE style
             my $style = "";
             if ( $oneregistry->{'Styles'} ) { $style = $oneregistry->{'Styles'}; }
-            if ( $style =~ /\bDONT_DELETE\b/ ) { $installer::globals::dontdeletecomponents{$registry{'Component_'}} = 1; }
-
             # Collecting all registry components with ALWAYS_REQUIRED style
             if ( ! ( $style =~ /\bALWAYS_REQUIRED\b/ ))
             {