Revert "#42 support raw interrupt handling using std::function on ESP32 and STM32 boards"

This reverts commit 573602b

Author: davetcc

src/TaskManagerIO.h

@@ -40,6 +40,11 @@ uint32_t micros();
 #define delayMicroseconds(x) wait_us(x)
 #endif // IOA_USE_MBED
 
+/**
+ * the definition of an interrupt handler function, to be called back when an interrupt occurs.
+ */
+typedef void (*RawIntHandler)();
+
 /**
  * Definition of a function to be called back when an interrupt is detected, marshalled by task manager into a task.
  * The pin that caused the interrupt is passed in the parameter on a best efforts basis.

src/TaskPlatformDeps.h

@@ -371,6 +371,4 @@ namespace tm_internal {
 #endif // _has_include
 #endif // GCC>=5 and !TM_ALLOW_CAPTURED_LAMBDA
 
-typedef void (*RawIntHandler)();
-
 #endif //TASKMANGERIO_PLATFORMDETERMINATION_H