diff --git a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/FunctionalInterrupts.h b/libraries/esp8266/examples/GPIO/FunctionalInterrupt/FunctionalInterrupts.h
index ef75a9525f..9c5d554e27 100644
--- a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/FunctionalInterrupts.h
+++ b/libraries/esp8266/examples/GPIO/FunctionalInterrupt/FunctionalInterrupts.h
@@ -4,7 +4,6 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <functional>
-#include "ScheduledFunctions.h"
 
 // Structures for communication
 
diff --git a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.cpp b/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.cpp
deleted file mode 100644
index 25bc58db61..0000000000
--- a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.cpp
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * ScheduledFunctions.cpp
- *
- *  Created on: 27 apr. 2018
- *      Author: Herman
- */
-#include "ScheduledFunctions.h"
-
-std::list<ScheduledFunctions::ScheduledElement> ScheduledFunctions::scheduledFunctions;
-
-ScheduledFunctions::ScheduledFunctions()
-:ScheduledFunctions(UINT_MAX)
-{
-}
-
-ScheduledFunctions::ScheduledFunctions(unsigned int reqMax)
-{
-	maxElements = reqMax;
-}
-
-ScheduledFunctions::~ScheduledFunctions() {
-}
-
-ScheduledRegistration ScheduledFunctions::insertElement(ScheduledElement se, bool front)
-{
-	if (countElements >= maxElements)
-	{
-		return nullptr;
-	}
-	else
-	{
-		countElements++;
-		if (front)
-		 {
-			scheduledFunctions.push_front(se);
-			return scheduledFunctions.begin()->registration;
-		 }
-		 else
-		 {
-			 scheduledFunctions.push_back(se);
-			 return scheduledFunctions.rbegin()->registration;
-		 }
-	}
-}
-
-std::list<ScheduledFunctions::ScheduledElement>::iterator ScheduledFunctions::eraseElement(std::list<ScheduledFunctions::ScheduledElement>::iterator it)
-{
-	countElements--;
-	return scheduledFunctions.erase(it);
-}
-
-bool ScheduledFunctions::scheduleFunction(ScheduledFunction sf, bool continuous, bool front)
-{
-	return (insertElement({this,continuous,nullptr,sf}, front) == nullptr);
-}
-
-bool ScheduledFunctions::scheduleFunction(ScheduledFunction sf)
-{
-	return scheduleFunction(sf, false, false);
-}
-
-ScheduledRegistration ScheduledFunctions::scheduleFunctionReg (ScheduledFunction sf, bool continuous, bool front)
-{
-	return insertElement({this,continuous,std::make_shared<int>(1),sf},front);
-}
-
-void ScheduledFunctions::runScheduledFunctions()
-{
-	auto lastElement = scheduledFunctions.end(); // do not execute elements added during runScheduledFunctions
-	auto it = scheduledFunctions.begin();
-	while (it != lastElement)
-	{
-		bool erase = false;
-		if (it->registration == nullptr)
-		{
-			it->function();
-		}
-		else
-		{
-			if (it->registration.use_count() > 1)
-			{
-				it->function();
-			}
-			else
-			{
-				erase = true;
-			}
-		}
-		if ((!it->continuous) || (erase))
-		{
-			it = it->_this->eraseElement(it);
-		}
-		else
-		{
-			it++;
-		}
-	}
-}
-
-void ScheduledFunctions::removeFunction(ScheduledRegistration sr)
-{
-	auto it = scheduledFunctions.begin();
-	bool removed = false;
-	while ((!removed) && (it != scheduledFunctions.end()))
-	{
-		if (it->registration == sr)
-		{
-			it = eraseElement(it);
-			removed = true;
-		}
-		else
-		{
-			it++;
-		}
-	}
-}
-
diff --git a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.h b/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.h
deleted file mode 100644
index 0129635364..0000000000
--- a/libraries/esp8266/examples/GPIO/FunctionalInterrupt/ScheduledFunctions.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * ScheduledFunctions.h
- *
- *  Created on: 27 apr. 2018
- *      Author: Herman
- */
-#include "Arduino.h"
-#include "Schedule.h"
-
-#include <functional>
-#include <memory>
-#include <list>
-#include <climits>
-
-#ifndef SCHEDULEDFUNCTIONS_H_
-#define SCHEDULEDFUNCTIONS_H_
-
-typedef std::function<void(void)> ScheduledFunction;
-typedef std::shared_ptr<void> ScheduledRegistration;
-
-class ScheduledFunctions {
-
-public:
-	ScheduledFunctions();
-	ScheduledFunctions(unsigned int reqMax);
-	virtual ~ScheduledFunctions();
-
-	struct ScheduledElement
-	{
-		ScheduledFunctions* _this;
-		bool continuous;
-		ScheduledRegistration registration;
-		ScheduledFunction function;
-	};
-
-	ScheduledRegistration insertElement(ScheduledElement se, bool front);
-	std::list<ScheduledElement>::iterator eraseElement(std::list<ScheduledElement>::iterator);
-	bool scheduleFunction(ScheduledFunction sf, bool continuous, bool front);
-	bool scheduleFunction(ScheduledFunction sf);
-	ScheduledRegistration scheduleFunctionReg (ScheduledFunction sf, bool continuous, bool front);
-	static void runScheduledFunctions();
-	void removeFunction(ScheduledRegistration sr);
-
-
-	static std::list<ScheduledElement> scheduledFunctions;
-	unsigned int maxElements;
-	unsigned int countElements = 0;
-
-};
-
-#endif /* SCHEDULEDFUNCTIONS_H_ */