Remove external/svox from the manifest.

Bug: N/A
Test: builds
Change-Id: I46b74ba6329ab61f879a47c61bd20484b84129a1

default.xml

@@ -313,7 +313,6 @@
   <project path="external/squashfs-tools" name="platform/external/squashfs-tools" groups="pdk" />
   <project path="external/strace" name="platform/external/strace" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/stressapptest" name="platform/external/stressapptest" groups="pdk" />
-  <project path="external/svox" name="platform/external/svox" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/swiftshader" name="platform/external/swiftshader" groups="pdk" />
   <project path="external/syslinux" name="platform/external/syslinux" groups="pdk" />
   <project path="external/tagsoup" name="platform/external/tagsoup" groups="pdk,pdk-cw-fs,pdk-fs" />