Revert "switch netd.o to BpfLoader v0.18 file format"

This reverts the previous commit.

This is no longer required as v0.18 is now the default.

Test: Treehugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I9331f27cf20e7932f6ef0e3829c27b6684dece59
diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
index 7e5218f..17c18c9 100644
--- a/bpf_progs/netd.c
+++ b/bpf_progs/netd.c
@@ -17,8 +17,6 @@
 // The resulting .o needs to load on the Android T Beta 3 bpfloader
 #define BPFLOADER_MIN_VER BPFLOADER_T_BETA3_VERSION
 
-#define V18
-
 #include <bpf_helpers.h>
 #include <linux/bpf.h>
 #include <linux/if.h>