Remove tools/gyp from the mojo repo

tools/gyp

diff --git a/tools/gyp b/tools/gyp
deleted file mode 160000
index 487c0b6..0000000
--- a/tools/gyp
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 487c0b6ae8b44932e45347211bca0e8387718436