Remove deprecated aura_shell_unittests target

build/all.gyp

Index: build/all.gyp
diff --git a/build/all.gyp b/build/all.gyp
index 98b595a6a431ef8555e494308d7890a1b8bf6d4b..758157735783999ef0654924d91df6cab357bb3a 100644
--- a/build/all.gyp
+++ b/build/all.gyp
@@ -640,12 +640,7 @@
             ['use_ash==1', {
               'dependencies': [
                 '../ash/ash.gyp:ash_shell',
-                # With aura_shell_unittests as a target ash_unittests (the new
-                # name) will be built as well.  We need both until all build
-                # bots are running ash_unittests as the test target.
-                # TODO(jamescook): Switch to ash_unittests after all bots on
-                # waterfall are using the new name.  crbug.com/110107
-                '../ash/ash.gyp:aura_shell_unittests',
+                '../ash/ash.gyp:ash_unittests',
               ],
             }],
             ['OS=="linux"', {