Remove redundant compiler settings keys

In an earlier commit list ordering keys were added to TCompilerSettings,
(either speculatively or by mistake). These keys were removed as they
are not used.

Author: delphidabbler

Src/Compilers.USettings.pas

@@ -27,8 +27,6 @@   TCompilerSettings = class(TNoConstructObject)
     const
       AllCompilersConfigSection = ssCompilers;
       PermitStartupDetectionKey = 'PermitStartupDetection';
-      ListFPCAtTopKey = 'Lists:FPCAtTop';
-      ListDelphiOldestFirstKey = 'Lists:DelphiOldestFirst';
     class function ReadStorage: ISettingsSection;
     class procedure DoSaveProperty(const WriteProp: TProc<ISettingsSection>);
     class procedure SaveProperty(const Key: string; const Value: Boolean);