Remove QSPISecure from Portenta_System

Will move it inside variant

Author: facchinm

libraries/STM32H747_System/src/Portenta_System.cpp

@@ -16,14 +16,6 @@ bool arduino::Portenta_System::enterLowPower() {
   /* TO DO */
 }
 
-// 8Kbit secure OTP area (on MX25L12833F)
-bool arduino::Portenta_System::getSecureFlashData(void* buf, size_t size) {
-    static SecureQSPIFBlockDevice root;
-    root.init();
-    auto ret = root.readSecure(buf, 0, size > 512 ? 512 : size);
-    return ret == 0;
-}
-
 arduino::Portenta_System Portenta;
 
 #endif

libraries/STM32H747_System/src/Portenta_System.h

@@ -12,7 +12,8 @@ class Portenta_System: public STM32H747
   Portenta_System() {};
   virtual bool begin();
   virtual bool enterLowPower();
-  bool getSecureFlashData(void* buf, size_t size);
+  String getBoardRevision();
+  uint16_t getCarrierSpecs();
 };
 
 }