gd: Remove logging for DELETE_STORED_LINK_KEY

- The command is actually a no-op since the controller
  never saves link-keys to the key store by default
  and gd doesn't either

- gd never checks the supported command mask before sending
  the command, and the logger fails to parse the
  response when it has status UNKNOWN_OPCODE

Bug: 268254139
Test: NA
Change-Id: I52969de202242e5fba72062e2041dac3c58dc107