Remove platform/external/hyphenation and platform/external/libxslt

Change-Id: I1b42f5417f9225c56c8f8a4bef30ff519112d398

default.xml

@@ -137,7 +137,6 @@
   <project path="external/hamcrest" name="platform/external/hamcrest" />
   <project path="external/harfbuzz" name="platform/external/harfbuzz" />
   <project path="external/harfbuzz_ng" name="platform/external/harfbuzz_ng" />
-  <project path="external/hyphenation" name="platform/external/hyphenation" />
   <project path="external/icu" name="platform/external/icu" groups="pdk" />
   <project path="external/iproute2" name="platform/external/iproute2" groups="pdk" />
   <project path="external/ipsec-tools" name="platform/external/ipsec-tools" />
@@ -182,7 +181,6 @@
   <project path="external/libvorbis" name="platform/external/libvorbis" />
   <project path="external/libvpx" name="platform/external/libvpx" groups="pdk" />
   <project path="external/libxml2" name="platform/external/libxml2" />
-  <project path="external/libxslt" name="platform/external/libxslt" />
   <project path="external/libyuv" name="platform/external/libyuv" groups="libyuv" />
   <project path="external/linux-tools-perf" name="platform/external/linux-tools-perf" />
   <project path="external/littlemock" name="platform/external/littlemock" />