tcgbios: Remove unused const variable

Remove the unused array `PhysicalPresence_CMD_DISABLE` to fix GCC 6
warnings.

Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/src/tcgbios.c b/src/tcgbios.c
index ddf4f79..334d99b 100644
--- a/src/tcgbios.c
+++ b/src/tcgbios.c
@@ -33,7 +33,6 @@
 static const u8 Startup_ST_STATE[] = { 0x00, TPM_ST_STATE };
 
 static const u8 PhysicalPresence_CMD_ENABLE[]  = { 0x00, 0x20 };
-static const u8 PhysicalPresence_CMD_DISABLE[] = { 0x01, 0x00 };
 static const u8 PhysicalPresence_PRESENT[]     = { 0x00, 0x08 };
 static const u8 PhysicalPresence_NOT_PRESENT_LOCK[] = { 0x00, 0x14 };