mtk-rt5650: remove duplicate JackControl "Headset Jack" lines

We cannot judge which device should be activated in this case.

Fixes: #336
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

ucm2/MediaTek/mtk-rt5650/HiFi.conf

@@ -45,7 +45,6 @@ SectionDevice."Headphones" {
 		PlaybackPriority 200
 		PlaybackMixerElem "Headphone"
 		PlaybackVolume "Headphone Playback Volume"
-		JackControl "Headset Jack"
 		JackHWMute "Speaker"
 	}
 }
@@ -79,7 +78,6 @@ SectionDevice."Headset" {
 		CaptureMasterElem "ADC"
 		CaptureMixerElem "IN"
 		CaptureVolume "IN Capture Volume"
-		JackControl "Headset Jack"
 		JackHWMute "Mic"
 	}
 }