diff --git a/.cmake/test_filesystem.cpp.in b/.cmake/test_filesystem.cpp.in
deleted file mode 100644
index e29d850d..00000000
--- a/.cmake/test_filesystem.cpp.in
+++ /dev/null
@@ -1,22 +0,0 @@
-// This is a dummy program that just needs to compile and link to tell us if
-// the C++17 std::filesystem API is available. Use CMake's configure_file
-// command to replace the FILESYSTEM_HEADER and FILESYSTEM_NAMESPACE tokens
-// for each combination of headers and namespaces which we want to pass to the
-// CMake try_compile command.
-
-#include <@FILESYSTEM_HEADER@>
-
-int main()
-{
-    try
-    {
-        throw @FILESYSTEM_NAMESPACE@::filesystem_error("instantiate one to make sure it links",
-            std::make_error_code(std::errc::function_not_supported));
-    }
-    catch (const @FILESYSTEM_NAMESPACE@::filesystem_error& error)
-    {
-        return -1;
-    }
-
-    return !@FILESYSTEM_NAMESPACE@::temp_directory_path().is_absolute();
-}
\ No newline at end of file