Remove separate ALSA repo.

We're using buildroot/unpatched opensource ALSA, so we don't need a
separate repo for any changes any more.

Change-Id: If22b3e709c008f66c648e704e9a0959b7ba5245b
diff --git a/default.xml b/default.xml
index 600da92..7af138d 100644
--- a/default.xml
+++ b/default.xml
@@ -33,7 +33,6 @@
   <project name="vendor-google-telepresence"    path="vendor/google/telepresence"/>
   <project name="vendor-google-tvstreamparser"  path="vendor/google/tvstreamparser"/>
   <project name="vendor-google-mcastcapture"    path="vendor/google/mcastcapture"/>
-  <project name="vendor-opensource-alsa-lib"    path="vendor/opensource/alsa-lib"/>
   <project name="vendor-opensource-ffmpeg"      path="vendor/opensource/ffmpeg"/>
   <project name="vendor-opensource-libjingle"   path="vendor/opensource/libjingle"/>
   <project name="vendor-opensource-tarballs"    path="vendor/opensource/tarballs"/>