Drop references to clang-pseudo-gen after removal

pseudo was removed from clang-tools-extra in upstream PR llvm/llvm-project#109154
Drop two explicit references in swift and unblock Windows CI

Author: weliveindetail

utils/build.ps1

@@ -1350,7 +1350,7 @@ function Build-BuildTools($Arch) {
     -Bin (Get-BuildProjectBinaryCache BuildTools) `
     -Arch $Arch `
     -UseMSVCCompilers C,CXX `
-    -BuildTargets llvm-tblgen,clang-tblgen,clang-pseudo-gen,clang-tidy-confusable-chars-gen,lldb-tblgen,llvm-config,swift-def-to-strings-converter,swift-serialize-diagnostics,swift-compatibility-symbols `
+    -BuildTargets llvm-tblgen,clang-tblgen,clang-tidy-confusable-chars-gen,lldb-tblgen,llvm-config,swift-def-to-strings-converter,swift-serialize-diagnostics,swift-compatibility-symbols `
     -Defines @{
       CMAKE_CROSSCOMPILING = "NO";
       LLDB_ENABLE_PYTHON = "NO";

utils/swift_build_support/swift_build_support/products/llvm.py

@@ -382,8 +382,6 @@ def build(self, host_target):
                                                 'clang-tidy-confusable-chars-gen')
             llvm_cmake_options.define('CLANG_TIDY_CONFUSABLE_CHARS_GEN',
                                       confusable_chars_gen)
-            pseudo_gen = os.path.join(host_build_dir, 'bin', 'clang-pseudo-gen')
-            llvm_cmake_options.define('CLANG_PSEUDO_GEN', pseudo_gen)
             llvm = os.path.join(host_build_dir, 'llvm')
             llvm_cmake_options.define('LLVM_NATIVE_BUILD', llvm)