Make MKR1000 variant compliance level 1.6.6

variants/mkr1000/variant.h

@@ -18,8 +18,8 @@
 
 #pragma once
 
-// The definitions here needs a SAMD core >=1.6.3
-#define ARDUINO_SAMD_VARIANT_COMPLIANCE 10603
+// The definitions here needs a SAMD core >=1.6.6
+#define ARDUINO_SAMD_VARIANT_COMPLIANCE 10606
 
 #include <WVariant.h>
 
@@ -51,7 +51,6 @@
 #define portInputRegister(port)  (&(port->IN.reg))
 #define portModeRegister(port)   (&(port->DIR.reg))
 #define digitalPinHasPWM(P)      (g_APinDescription[P].ulPWMChannel != NOT_ON_PWM || g_APinDescription[P].ulTCChannel != NOT_ON_TIMER)
-#define digitalPinToInterrupt(P) (g_APinDescription[P].ulExtInt)
 
 /*
  * digitalPinToTimer(..) is AVR-specific and is not defined for SAMD