package/portaudio: Remove threads dependency for alsa module

Portaudio as a whole already depends on threads support, so there is no
need to have an additional dependency for its alsa module.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/portaudio/Config.in

@@ -15,7 +15,6 @@ if BR2_PACKAGE_PORTAUDIO
 config BR2_PACKAGE_PORTAUDIO_ALSA
 	bool "alsa support"
 	select BR2_PACKAGE_ALSA_LIB
-	depends on BR2_TOOLCHAIN_HAS_THREADS # alsa-lib
 	default y
 	help
 	  Compile with ALSA support.