drm/amd/amdgpu/amdgpu_display: Remove pointless header

It seems only to repeat the function name.

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:450: warning: Function parameter or member 'amdgpu_connector' not described in 'amdgpu_display_ddc_probe'
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:450: warning: Function parameter or member 'use_aux' not described in 'amdgpu_display_ddc_probe'

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: report to <xorg-driver-ati@lists.x.org>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

@@ -441,10 +441,6 @@ void amdgpu_display_print_display_setup(struct drm_device *dev)
 	drm_connector_list_iter_end(&iter);
 }
 
-/**
- * amdgpu_display_ddc_probe
- *
- */
 bool amdgpu_display_ddc_probe(struct amdgpu_connector *amdgpu_connector,
 			      bool use_aux)
 {