Merge pull request #594 from jtattermusch/fix_include

Fixed string.h include
diff --git a/include/grpc/grpc b/include/grpc/grpc
deleted file mode 120000
index fc80ad1..0000000
--- a/include/grpc/grpc
+++ /dev/null
@@ -1 +0,0 @@
-/home/craig/grpc-ct/include/grpc
\ No newline at end of file