[libc++][NFC] Remove rebase artifact

I found it in this commit: https://github.com/llvm/llvm-project/commit/a203acb9dd7227323d6161431225189d49917744

Reviewed By: Mordante

Differential Revision: https://reviews.llvm.org/D131163

GitOrigin-RevId: 1915c1c01e6c84a1fda5a313f85e2a3dbccd7ce0
diff --git a/include/algorithm b/include/algorithm
index 227a408..bf8a984 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -936,7 +936,6 @@
               indirectly_copyable_storable<iterator_t<R>, O>)
     constexpr unique_copy_result<borrowed_iterator_t<R>, O>
       unique_copy(R&& r, O result, C comp = {}, Proj proj = {});                                   // Since C++20
-<<<<<<< HEAD
 
   template<class I, class O>
       using remove_copy_result = in_out_result<I, O>;                                              // Since C++20