COMPMID-3532: Align data type support between doxygen and implementation - CPP

The patch also removes some unused NEON kernels.

Change-Id: I4a7622f31c88ee038b21874614a981764a03122a
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3509
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sheri Zhang <sheri.zhang@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/CPP/functions/CPPTopKV.h b/arm_compute/runtime/CPP/functions/CPPTopKV.h
index c94e277..fb93bdf 100644
--- a/arm_compute/runtime/CPP/functions/CPPTopKV.h
+++ b/arm_compute/runtime/CPP/functions/CPPTopKV.h
@@ -39,7 +39,7 @@
     /** Set the input and output of the kernel.
      *
      * @param[in]  predictions A batch_size x classes tensor. Data types supported: F16/S32/F32/QASYMM8/QASYMM8_SIGNED
-     * @param[in]  targets     A batch_size 1D tensor of class ids. Data types supported: S32
+     * @param[in]  targets     A batch_size 1D tensor of class ids. Data types supported: U32
      * @param[out] output      Computed precision at @p k as a bool 1D tensor. Data types supported: U8
      * @param[in]  k           Number of top elements to look at for computing precision.
      */
@@ -48,7 +48,7 @@
     /** Static function to check if given info will lead to a valid configuration of @ref CPPTopKVKernel
      *
      * @param[in] predictions A batch_size x classes tensor info. Data types supported: F16/S32/F32/QASYMM8/QASYMM8_SIGNED
-     * @param[in] targets     A batch_size 1D tensor info of class ids. Data types supported: S32
+     * @param[in] targets     A batch_size 1D tensor info of class ids. Data types supported: U32
      * @param[in] output      Computed precision at @p k as a bool 1D tensor info. Data types supported: U8
      * @param[in] k           Number of top elements to look at for computing precision.
      *