COMPMID-1815 Remove templates from NEFillborderKernel and create INESimpleFunctionNoBorder

Change-Id: Ia9fdc75b23e9a6208058f8406fb7b5fcd917de2c
Reviewed-on: https://review.mlplatform.org/311
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEFlattenLayer.h b/arm_compute/runtime/NEON/functions/NEFlattenLayer.h
index 26d7c7f..3365b35 100644
--- a/arm_compute/runtime/NEON/functions/NEFlattenLayer.h
+++ b/arm_compute/runtime/NEON/functions/NEFlattenLayer.h
@@ -25,14 +25,14 @@
 #define __ARM_COMPUTE_NEFLATTENLAYER_H__
 
 #include "arm_compute/core/Types.h"
-#include "arm_compute/runtime/NEON/INESimpleFunction.h"
+#include "arm_compute/runtime/NEON/INESimpleFunctionNoBorder.h"
 
 namespace arm_compute
 {
 class ITensor;
 
 /** Basic function to execute flatten layer kernel. */
-class NEFlattenLayer : public INESimpleFunction
+class NEFlattenLayer : public INESimpleFunctionNoBorder
 {
 public:
     /** Initialise the kernel's input and output.