remove std::experimental usage

The bug previously referenced that instigated the usage of
std::experimental::any instead of std::any has long been fixed in
GCC/libstdc++.  Switch back to use the non-experimental library.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icb162fd24105b32196993c319ddf232ab1b8c50e
diff --git a/test/test_activation.cpp b/test/test_activation.cpp
index f2cc1ef..8da5b2d 100644
--- a/test/test_activation.cpp
+++ b/test/test_activation.cpp
@@ -14,7 +14,7 @@
 using ::testing::Return;
 using ::testing::StrEq;
 
-using std::experimental::any;
+using std::any;
 
 class TestActivation : public ::testing::Test
 {