Remove platform/external/littlemock

Bug: 70636949
Merged-In: Ic789e4e678e0728c0ba258dcf07013f5aeda61a2
diff --git a/default.xml b/default.xml
index 98f73b9..c5c7683 100644
--- a/default.xml
+++ b/default.xml
@@ -249,7 +249,6 @@
   <project path="external/libyuv" name="platform/external/libyuv" groups="libyuv,pdk-cw-fs,pdk-fs" />
   <project path="external/linux-kselftest" name="platform/external/linux-kselftest" groups="vts,pdk-fs" />
   <project path="external/lisa" name="platform/external/lisa" groups="pdk" />
-  <project path="external/littlemock" name="platform/external/littlemock" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/lld" name="platform/external/lld" groups="pdk-fs" />
   <project path="external/llvm" name="platform/external/llvm" groups="pdk" />
   <project path="external/lmfit" name="platform/external/lmfit" groups="pdk" />