pnor_partition: Remove redundant ReturnCode enum

Change-Id: I25726e9fe97b37d9be0bab10a84f20d0bab9f5c9
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/pnor_partition.hpp b/pnor_partition.hpp
index caa930a..80777ce 100644
--- a/pnor_partition.hpp
+++ b/pnor_partition.hpp
@@ -20,15 +20,6 @@
 
 namespace fs = std::experimental::filesystem;
 
-enum class ReturnCode : uint8_t
-{
-    FILE_NOT_FOUND = 0,
-    PARTITION_NOT_FOUND = 1,
-    PARTITION_READ_ONLY = 2,
-    FILE_OPEN_FAILURE = 3,
-    SUCCESS = 4,
-};
-
 class Request
 {
   public: