[ClangExpressionDeclMap] Remove divergence from upstream lldb.

<rdar://problem/36377967>

lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp

@@ -1624,22 +1624,6 @@ bool ClangExpressionDeclMap::GetVariableValue(VariableSP &var,
     return false;
   }
 
-  if (llvm::isa<SwiftASTContext>(var_clang_type.GetTypeSystem())) {
-#ifdef CAN_IMPORT_SWIFT_CLANG_TYPES // <rdar://problem/16102770> ASTImporter
-                                    // can't import Swift-generated types
-    // Try to get a Clang type for the Swift type.
-
-    if (!var_clang_type.IsImportedType(&var_clang_type)) {
-      if (log)
-        log->PutCString("Skipped a definition because it has a Swift type and "
-                        "we can't get a Clang type for it");
-      return false;
-    }
-#else
-    return false;
-#endif
-  }
-
   ClangASTContext *clang_ast = llvm::dyn_cast_or_null<ClangASTContext>(
       var_type->GetForwardCompilerType().GetTypeSystem());