drop struct keyword for non-packed objects

As a style decision, struct is often used with packed structures to
indicate they are used like C-structs.  Cleanup this codebase to not use
the extra struct keyword throughout.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I2f83bb1989e4d1f2f843ba3e45fb82e04f0fa61c
diff --git a/main.cpp b/main.cpp
index f5d34e0..9a47a00 100644
--- a/main.cpp
+++ b/main.cpp
@@ -51,11 +51,11 @@
 {
 
 /* The configuration converted sensor list. */
-std::map<std::string, struct conf::SensorConfig> sensorConfig = {};
+std::map<std::string, conf::SensorConfig> sensorConfig = {};
 /* The configuration converted PID list. */
 std::map<int64_t, conf::PIDConf> zoneConfig = {};
 /* The configuration converted Zone configuration. */
-std::map<int64_t, struct conf::ZoneConfig> zoneDetailsConfig = {};
+std::map<int64_t, conf::ZoneConfig> zoneDetailsConfig = {};
 
 } // namespace pid_control