NetBpfLoad: lookupSelinuxContext() does not need 2nd arg

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ia1cd57699cc8419f84e474c1c9812a56fb3ffd20
diff --git a/netbpfload/NetBpfLoad.cpp b/netbpfload/NetBpfLoad.cpp
index 2002943..8b539aa 100644
--- a/netbpfload/NetBpfLoad.cpp
+++ b/netbpfload/NetBpfLoad.cpp
@@ -142,9 +142,9 @@
 
 static unsigned int page_size = static_cast<unsigned int>(getpagesize());
 
-constexpr const char* lookupSelinuxContext(const domain d, const char* const unspecified = "") {
+constexpr const char* lookupSelinuxContext(const domain d) {
     switch (d) {
-        case domain::unspecified:   return unspecified;
+        case domain::unspecified:   return "";
         case domain::tethering:     return "fs_bpf_tethering";
         case domain::net_private:   return "fs_bpf_net_private";
         case domain::net_shared:    return "fs_bpf_net_shared";