build: set NEO_LEGACY_PLATFORMS_SUPPORT to FALSE by default

Related-To: NEO-6683
Signed-off-by: Artur Harasimiuk <artur.harasimiuk@intel.com>

Author: ArturHarasimiuk

CMakeLists.txt

@@ -499,11 +499,7 @@ if(DEFINED NEO_ALLOW_LEGACY_PLATFORMS_SUPPORT AND NOT DEFINED NEO_LEGACY_PLATFOR
   set(NEO_LEGACY_PLATFORMS_SUPPORT ${NEO_ALLOW_LEGACY_PLATFORMS_SUPPORT})
 endif()
 if(NOT DEFINED NEO_LEGACY_PLATFORMS_SUPPORT)
-  if(WIN32)
-    set(NEO_LEGACY_PLATFORMS_SUPPORT FALSE)
-  else()
-    set(NEO_LEGACY_PLATFORMS_SUPPORT TRUE)
-  endif()
+  set(NEO_LEGACY_PLATFORMS_SUPPORT FALSE)
 endif()
 if(NOT DEFINED NEO_CURRENT_PLATFORMS_SUPPORT)
   set(NEO_CURRENT_PLATFORMS_SUPPORT TRUE)