build(windows): drop unused boost-locale (#5116)

cmake/dependencies/Boost_Sunshine.cmake

@@ -6,13 +6,16 @@ include_guard(GLOBAL)
 set(BOOST_VERSION "1.89.0")
 set(BOOST_COMPONENTS
         filesystem
-        locale
         log
         program_options
         system
 )
 # system is not used by Sunshine, but by Simple-Web-Server, added here for convenience
 
+if(NOT WIN32)
+    list(APPEND BOOST_COMPONENTS locale)
+endif()
+
 # algorithm, preprocessor, scope, and uuid are not used by Sunshine, but by libdisplaydevice, added here for convenience
 if(WIN32)
     list(APPEND BOOST_COMPONENTS