drm/i915/display: Drop dead code from hsw_read_infoframe()

HSW_TVIDEO_DIP_CTL is read but not used.
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210418002126.87882-4-jose.souza@intel.com

drivers/gpu/drm/i915/display/intel_hdmi.c

@@ -543,11 +543,9 @@ void hsw_read_infoframe(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
-	u32 val, *data = frame;
+	u32 *data = frame;
 	int i;
 
-	val = intel_de_read(dev_priv, HSW_TVIDEO_DIP_CTL(cpu_transcoder));
-
 	for (i = 0; i < len; i += 4)
 		*data++ = intel_de_read(dev_priv,
 				        hsw_dip_data_reg(dev_priv, cpu_transcoder, type, i >> 2));