clang-tidy: Fix clang-analyzer-deadcode.DeadStores diagnostics

```
/usr/bin/clang-tidy -checks=-*, clang-analyzer-deadcode.DeadStores -export-fixes /tmp/tmpwjsgsj4m/tmpthfbx7xt.yaml -p=build /mnt/host/andrew/src/openbmc/libpldm/tests/libpldm_pdr_test.cpp
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:995:5: error: Value stored to 'start' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:995:5: note: Value stored to 'start' is never read
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1031:5: error: Value stored to 'start' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1031:5: note: Value stored to 'start' is never read
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1067:5: error: Value stored to 'start' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1067:5: note: Value stored to 'start' is never read
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1103:5: error: Value stored to 'start' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1103:5: note: Value stored to 'start' is never read
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1134:5: error: Value stored to 'start' is never read [clang-analyzer-deadcode.DeadStores,-warnings-as-errors]
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
/mnt/host/andrew/src/openbmc/libpldm/build/../tests/libpldm_pdr_test.cpp:1134:5: note: Value stored to 'start' is never read
    start += sizeof(pldm_entity);
    ^        ~~~~~~~~~~~~~~~~~~~
```

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I53e2c8c647b03e0f7531f58201de50f3895c0404
diff --git a/tests/libpldm_pdr_test.cpp b/tests/libpldm_pdr_test.cpp
index 8c572fc..2af2c34 100644
--- a/tests/libpldm_pdr_test.cpp
+++ b/tests/libpldm_pdr_test.cpp
@@ -992,7 +992,6 @@
     EXPECT_EQ(le16toh(entity->entity_type), 3u);
     EXPECT_EQ(le16toh(entity->entity_instance_num), 2u);
     EXPECT_EQ(le16toh(entity->entity_container_id), 1u);
-    start += sizeof(pldm_entity);
 
     currRecHandle = nextRecHandle;
 
@@ -1028,7 +1027,6 @@
     EXPECT_EQ(le16toh(entity->entity_type), 2u);
     EXPECT_EQ(le16toh(entity->entity_instance_num), 2u);
     EXPECT_EQ(le16toh(entity->entity_container_id), 1u);
-    start += sizeof(pldm_entity);
 
     currRecHandle = nextRecHandle;
 
@@ -1064,7 +1062,6 @@
     EXPECT_EQ(le16toh(entity->entity_type), 5u);
     EXPECT_EQ(le16toh(entity->entity_instance_num), 3u);
     EXPECT_EQ(le16toh(entity->entity_container_id), 2u);
-    start += sizeof(pldm_entity);
 
     currRecHandle = nextRecHandle;
 
@@ -1100,7 +1097,6 @@
     EXPECT_EQ(le16toh(entity->entity_type), 5u);
     EXPECT_EQ(le16toh(entity->entity_instance_num), 1u);
     EXPECT_EQ(le16toh(entity->entity_container_id), 2u);
-    start += sizeof(pldm_entity);
 
     currRecHandle = nextRecHandle;
 
@@ -1131,7 +1127,6 @@
     EXPECT_EQ(le16toh(entity->entity_type), 6u);
     EXPECT_EQ(le16toh(entity->entity_instance_num), 1u);
     EXPECT_EQ(le16toh(entity->entity_container_id), 3u);
-    start += sizeof(pldm_entity);
 
     currRecHandle = nextRecHandle;