bios: delete persisted tables at startup

Leveraging the new registration scheme introduced in the previous
commit, delete persisted BIOS tables at PLDM daemon startup. This lets
us process new (via a firmware update, for eg) BIOS config JSONs.

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I2e7759261e80afb2f0a45d8598c36838ab530d54
diff --git a/libpldmresponder/bios.hpp b/libpldmresponder/bios.hpp
index e9abed2..f9a3eff 100644
--- a/libpldmresponder/bios.hpp
+++ b/libpldmresponder/bios.hpp
@@ -51,17 +51,7 @@
 class Handler : public CmdHandler
 {
   public:
-    Handler()
-    {
-        handlers.emplace(PLDM_GET_DATE_TIME,
-                         [this](const pldm_msg* request, size_t payloadLength) {
-                             return this->getDateTime(request, payloadLength);
-                         });
-        handlers.emplace(PLDM_GET_BIOS_TABLE,
-                         [this](const pldm_msg* request, size_t payloadLength) {
-                             return this->getBIOSTable(request, payloadLength);
-                         });
-    }
+    Handler();
 
     /** @brief Handler for GetDateTime
      *