COMPMID-970 : Remove QS8 / QS16 support

Removed fixed point related code.

Change-Id: I487acf138dace3b0450e0d72ca7071eaec254566
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/137678
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEPoolingLayer.h b/arm_compute/runtime/NEON/functions/NEPoolingLayer.h
index 4224f75..26858d5 100644
--- a/arm_compute/runtime/NEON/functions/NEPoolingLayer.h
+++ b/arm_compute/runtime/NEON/functions/NEPoolingLayer.h
@@ -46,18 +46,18 @@
     NEPoolingLayer();
     /** Set the input and output tensors.
      *
-     * @note QS8, QS16 and F16 are supported for pool sizes 2 and 3 only
+     * @note F16 is supported for pool sizes 2 and 3 only
      *
-     * @param[in, out] input     Source tensor. (Written to only when padding != 0) Data types supported: QS8/QASYMM8/QS16/F16/F32.
+     * @param[in, out] input     Source tensor. (Written to only when padding != 0) Data types supported: QASYMM8/F16/F32.
      * @param[out]     output    Destination tensor. Data types supported: Same as @p input.
      * @param[in]      pool_info Contains pooling operation information described in @ref PoolingLayerInfo.
      */
     void configure(ITensor *input, ITensor *output, const PoolingLayerInfo &pool_info);
     /** Static function to check if given info will lead to a valid configuration of @ref NEPoolingLayer
      *
-     * @note QS8, QS16 and F16 are supported for pool sizes 2 and 3 only
+     * @note F16 is supported for pool sizes 2 and 3 only
      *
-     * @param[in] input     Source tensor. (Written to only when padding != 0) Data types supported: QS8/QASYMM8/QS16/F16/F32.
+     * @param[in] input     Source tensor. (Written to only when padding != 0) Data types supported: QASYMM8/F16/F32.
      * @param[in] output    Destination tensor. Data types supported: Same as @p input.
      * @param[in] pool_info Contains pooling operation information described in @ref PoolingLayerInfo.
      *