Remove support for old Windows SDK versions

commit_hash:ff7e579382854cf7f0fedced54e75557b2597196

Author: georgthegreat

build/ymake_conf.py

@@ -1839,12 +1839,7 @@ def __init__(self, build, detector):
             # TODO(somov): Определять автоматически self.version в этом случае
 
         else:
-            if self.version_at_least(2019):
-                self.sdk_version = '10.0.18362.0'
-                if is_positive('MSVC20'):  # XXX: temporary flag, remove after DTCC-123 is completed
-                    self.cxx_std = 'c++latest'
-            else:
-                self.sdk_version = '10.0.16299.0'
+            self.sdk_version = '10.0.18362.0'
             sdk_dir = '$WINDOWS_KITS_RESOURCE_GLOBAL'
 
             self.vc_root = self.name_marker if not self.use_clang else '$MSVC_FOR_CLANG_RESOURCE_GLOBAL'
@@ -1916,9 +1911,6 @@ def print_toolchain(self):
 
         emit('TOOLCHAIN_ENV', format_env(self.tc.get_env(), list_separator=';'))
 
-        if self.tc.sdk_version:
-            emit('WINDOWS_KITS_VERSION', self.tc.sdk_version)
-
         if self.tc.under_wine_tools:
             emit('_UNDER_WINE_TOOLS', 'yes')
         if self.tc.under_wine_link: