hekate/Nyx: remove Sept completely

- remove any reference to sept and parsing of it
- completely refactor and simplify keygen
- use new Atmo tsec keygen for 7.0.0 and up
- simplify all info/tools that depend on hos keygen and bis keys

nyx/nyx_gui/config.h

@@ -33,12 +33,8 @@ typedef struct _hekate_config
 	u32 bootprotect;
 	// Global temporary config.
 	bool t210b01;
-	bool se_keygen_done;
-	bool sept_run;
-	bool aes_slots_new;
 	bool emummc_force_disable;
 	bool rcm_patched;
-	bool sbk_set;
 	u32  errors;
 	hos_eks_mbr_t *eks;
 } hekate_config;