[FL-1818] System setting and debug options. RTC HAL refactoring. (#902)

* FuriHal: RTC API refactoring. System Setting application. FuriCore: adjustable log levels. Minor code cleanup.
* Storage: change logging levels for internal storage.
* FuriCore: fix broken trace logging level

firmware/targets/furi-hal-include/furi-hal-bootloader.h

@@ -17,12 +17,6 @@ typedef enum {
     FuriHalBootloaderModeDFU
 } FuriHalBootloaderMode;
 
-/** Boot flags */
-typedef enum {
-    FuriHalBootloaderFlagDefault=0,
-    FuriHalBootloaderFlagFactoryReset=1,
-} FuriHalBootloaderFlag;
-
 /** Initialize boot subsystem
  */
 void furi_hal_bootloader_init();
@@ -33,18 +27,6 @@ void furi_hal_bootloader_init();
  */
 void furi_hal_bootloader_set_mode(FuriHalBootloaderMode mode);
 
-/** Set bootloader flags
- *
- * @param[in]  flags  FuriHalBootloaderFlag
- */
-void furi_hal_bootloader_set_flags(FuriHalBootloaderFlag flags);
-
-/** Get boot flag
- *
- * @return     FuriHalBootloaderFlag
- */
-FuriHalBootloaderFlag furi_hal_bootloader_get_flags();
-
 #ifdef __cplusplus
 }
 #endif