efi_loader: remove outdated TODO in efi_memory.c

In efi_mem_sort() adjacent memory regions of same type are coalesced.
Remove the remark "Merging of adjacent free regions is missing".

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 11e7553..a3106ab 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -541,8 +541,6 @@
 
 	ret = efi_add_memory_map_pg(memory, pages, EFI_CONVENTIONAL_MEMORY,
 				    false);
-	/* Merging of adjacent free regions is missing */
-
 	if (ret != EFI_SUCCESS)
 		return EFI_NOT_FOUND;