Clean up clang-tidy warnings and unused variables

Change-Id: I1365edf8926908b3a49652fb87f079f8fbf1f56b

tests/amd_smi_test/functional/version_read.cc

@@ -20,8 +20,6 @@
  * THE SOFTWARE.
  */
 
-#include <cstdint>
-
 #include <iostream>
 
 #include <gtest/gtest.h>
@@ -58,8 +56,6 @@ void TestVersionRead::Close() {
   TestBase::Close();
 }
 
-static const uint32_t kVerMaxStrLen = 80;
-
 void TestVersionRead::Run(void) {
   amdsmi_status_t err;
   amdsmi_version_t ver = {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, nullptr};