tests: cleanup test code

Drop unused header and unused test object.

Change-Id: I65f74944a03c5b10a046bbf38da00bc5b386204c
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/firmware_canhandle_unittest.cpp b/test/firmware_canhandle_unittest.cpp
index 44223d4..ea7a8bf 100644
--- a/test/firmware_canhandle_unittest.cpp
+++ b/test/firmware_canhandle_unittest.cpp
@@ -2,7 +2,6 @@
 #include "firmware_handler.hpp"
 #include "image_mock.hpp"
 
-#include <memory>
 #include <vector>
 
 #include <gtest/gtest.h>
diff --git a/test/firmware_handler_unittest.cpp b/test/firmware_handler_unittest.cpp
index e6998c1..b9bc191 100644
--- a/test/firmware_handler_unittest.cpp
+++ b/test/firmware_handler_unittest.cpp
@@ -2,7 +2,6 @@
 #include "image_mock.hpp"
 
 #include <algorithm>
-#include <memory>
 #include <vector>
 
 #include <gtest/gtest.h>
diff --git a/test/firmware_open_unittest.cpp b/test/firmware_open_unittest.cpp
index 2b1a330..49d40a0 100644
--- a/test/firmware_open_unittest.cpp
+++ b/test/firmware_open_unittest.cpp
@@ -2,7 +2,6 @@
 #include "firmware_handler.hpp"
 #include "image_mock.hpp"
 
-#include <memory>
 #include <vector>
 
 #include <gmock/gmock.h>
diff --git a/test/firmware_stat_unittest.cpp b/test/firmware_stat_unittest.cpp
index ad43b60..60225be 100644
--- a/test/firmware_stat_unittest.cpp
+++ b/test/firmware_stat_unittest.cpp
@@ -1,7 +1,6 @@
 #include "firmware_handler.hpp"
 #include "image_mock.hpp"
 
-#include <memory>
 #include <vector>
 
 #include <gtest/gtest.h>
diff --git a/test/firmware_write_unittest.cpp b/test/firmware_write_unittest.cpp
index bac2d39..a53a32c 100644
--- a/test/firmware_write_unittest.cpp
+++ b/test/firmware_write_unittest.cpp
@@ -10,7 +10,6 @@
 
 namespace blobs
 {
-using ::testing::ElementsAreArray;
 using ::testing::Eq;
 using ::testing::Return;