fix Win32 build to avoid using version def Unicode

dlanguilib-win32.dproj

@@ -34,7 +34,6 @@
       <VersionIds>
         <String>USE_OPENGL</String>
         <String>USE_SDL</String>
-        <String>Unicode</String>
       </VersionIds>
     </VersionIds>
   </PropertyGroup>

dlanguilib.visualdproj

@@ -160,7 +160,6 @@
   <debuglevel>0</debuglevel>
   <debugids />
   <versionlevel>0</versionlevel>
-  <versionids>Unicode</versionids>
   <dump_source>0</dump_source>
   <mapverbosity>0</mapverbosity>
   <createImplib>0</createImplib>

dub.json

@@ -7,7 +7,6 @@
     "targetType": "none",
     "subPackages": [
         {
-			"versions-windows": ["Unicode"],
 			"name": "dlanguilib",
 			"description": "D language cross platform GUI library, inspired by Android UI API. Supports OpenGL based hardware acceleration, i18n, styles and themes.",
 			"homepage": "https://github.com/buggins/dlangui",