Remove an unused variable

This commit removes biosPasswordFile variable which is not used
anywhere in the code.

Tested by:
1. Removed the un-used variable and daemon still compiles and builds. So this commit is removing an already dead code. Functionally this does not impact any features.

Change-Id: Ic3a1642bff20977d34270e9d9015feee320db374
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/include/password.hpp b/include/password.hpp
index 52e5ab9..358c4ef 100644
--- a/include/password.hpp
+++ b/include/password.hpp
@@ -32,7 +32,6 @@
 {
 static constexpr auto objectPathPwd =
     "/xyz/openbmc_project/bios_config/password";
-constexpr auto biosPasswordFile = "passwordData";
 constexpr auto biosSeedFile = "seedData";
 constexpr uint8_t maxHashSize = 64;
 constexpr uint8_t maxSeedSize = 32;