network_manager: Remove unhandled exception

We can't throw here, just log an error and move on.

Change-Id: I2493eaa3354e1df578d56849e15d047070064160
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/src/network_manager.cpp b/src/network_manager.cpp
index f999f31..7e540d1 100644
--- a/src/network_manager.cpp
+++ b/src/network_manager.cpp
@@ -517,7 +517,6 @@
     {
         log<level::ERR>("Failed to reload configuration",
                         entry("ERR=%s", ex.what()));
-        elog<InternalFailure>();
     }
 }