Revert "Add support for 2d and 3d indices for axis 0"

This reverts commit 0db8b8bbd941b3dab4238c03e734e7ac43c662ed.

Relates to [COMPMID-5055]

Signed-off-by: Mohammed Suhail Munshi <MohammedSuhail.Munshi@arm.com>
Change-Id: I143e7965e21b956abb05ba5c41e12c5b73b7345a
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/7558
Reviewed-by: Pablo Marquez Tello <pablo.tello@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/NEGatherKernel.h b/src/core/NEON/kernels/NEGatherKernel.h
index fc0e678..6f00ddb 100644
--- a/src/core/NEON/kernels/NEGatherKernel.h
+++ b/src/core/NEON/kernels/NEGatherKernel.h
@@ -85,23 +85,18 @@
      *
      * For gather on the 0 axis an element by element copy is performed.
      *
-     * @param[in] window Region on which to run the kernel. (Must be a region of the window returned by window())
-     * @param[in] info   Info about running thread and CPU.
+     * @param[in] window Region on which to execute the kernel. (Must be a region of the window returned by window())
+     * @param[in] info   Info about executing thread and CPU.
      */
     template <typename U>
     void gather_0_axis(const Window &window, const ThreadInfo &info);
 
-    template <typename U>
-    void gather_dims_0_axis(const Window &window, const ThreadInfo &info);
-
-    template <typename U>
-    void gather_dims_n_axis(const Window &window, const ThreadInfo &info);
     /** Implementation of the gather operation.
      *
      * For 1<=axis a row-wise copy is taking place.
      *
-     * @param[in] window Region on which to run the kernel. (Must be a region of the window returned by window())
-     * @param[in] info   Info about running thread and CPU.
+     * @param[in] window Region on which to execute the kernel. (Must be a region of the window returned by window())
+     * @param[in] info   Info about executing thread and CPU.
      */
     template <typename U>
     void gather_n_axis(const Window &window, const ThreadInfo &info);