remove alsa from depends list of libsdl

conf/layer.conf

@@ -35,7 +35,7 @@ RPI_USE_wS_28_DPI_LCD = "1"
 ENABLE_DWC2_PERIPHERAL = "1"
 ENABLE_DWC2_HOST = "1"
 ENABLE_USB_U_BOOT = "0"
-ENABLE_UART = "1"
+ENABLE_UART = "0"
 DISABLE_SPLASH = "1"
 VIDEO_CAMERA = "1"
 DISABLE_RPI_BOOT_LOGO = "1"

recipes-multimedia/libsdl2/libsdl2_%.bbappend

@@ -1,4 +1,5 @@
-DEPENS += " mesa libdrm virtual/libgbm alsa virtual/libgles2 "
+DEPENS += " mesa libdrm virtual/libgbm virtual/libgles2 "
+# alsa
 EXTRA_OECONF:append=" --disable-video-x11 \
                         --disable-video-wayland \
                         --enable-video-kmsdrm \