Enable DPI aware setting in Lazarus demos for Windows

Cleanup some useless code in Lazarus demos for Windows

demos/Lazarus_Windows/JavaScript/JSSharedMemoryProcMessage/JSSharedMemoryProcMessage.lpi

@@ -15,6 +15,9 @@
       <UseAppBundle Value="False"/>
       <ResourceType Value="res"/>
       <UseXPManifest Value="True"/>
+      <XPManifest>
+        <DpiAware Value="True/PM_V2"/>
+      </XPManifest>
     </General>
     <BuildModes>
       <Item Name="Default" Default="True"/>

demos/Lazarus_Windows/JavaScript/JSSharedMemoryProcMessage/JSSharedMemoryProcMessage.lpr

@@ -6,14 +6,13 @@ program JSSharedMemoryProcMessage;
 
 uses
   Forms,
-  LCLIntf, LCLType, LMessages, Interfaces,
+  Windows,
+  Interfaces,
   uCEFApplication,
   uMainForm in 'uMainForm.pas' {MainForm};
 
-{.$R *.res}
-
-// CEF needs to set the LARGEADDRESSAWARE flag which allows 32-bit processes to use up to 3GB of RAM.
-{$SetPEFlags $20}
+// CEF needs to set the LARGEADDRESSAWARE ($20) flag which allows 32-bit processes to use up to 3GB of RAM.
+{$IFDEF WIN32}{$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE}{$ENDIF}
 
 {$R *.res}
 
@@ -24,8 +23,6 @@ begin
 
   if GlobalCEFApp.StartMainProcess then
     begin
-      //ReportMemoryLeaksOnShutdown := True;
-
       Application.Initialize;
       Application.MainFormOnTaskbar := True;
       Application.CreateForm(TMainForm, MainForm);