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/test/dbus_passive_unittest.cpp b/test/dbus_passive_unittest.cpp
index a04b4ec..e6f07a0 100644
--- a/test/dbus_passive_unittest.cpp
+++ b/test/dbus_passive_unittest.cpp
@@ -56,7 +56,7 @@
     std::string path = "/xyz/openbmc_project/sensors/unknown/id";
 
     auto helper = std::make_unique<DbusHelperMock>();
-    struct SensorProperties properties;
+    SensorProperties properties;
 
     DbusPassive(bus_mock, type, id, std::move(helper), properties, false, path,
                 nullptr);
@@ -78,7 +78,7 @@
                     getProperties(StrEq("asdf"), StrEq(path), NotNull()))
             .WillOnce(
                 Invoke([&](const std::string& service, const std::string& path,
-                           struct SensorProperties* prop) {
+                           SensorProperties* prop) {
                     prop->scale = _scale;
                     prop->value = _value;
                     prop->unit = "x";