cpplint: Cleanup errors

Cleanup errors from upstream cpplint in preparation
for moving art's cpplint fork to upstream tip-of-tree cpplint.

Test: cd art && mm
Bug: 68951293
Change-Id: I15faed4594cbcb8399850f8bdee39d42c0c5b956
diff --git a/compiler/verifier_deps_test.cc b/compiler/verifier_deps_test.cc
index f243e33..4709fd0 100644
--- a/compiler/verifier_deps_test.cc
+++ b/compiler/verifier_deps_test.cc
@@ -41,7 +41,7 @@
 
 class VerifierDepsCompilerCallbacks : public CompilerCallbacks {
  public:
-  explicit VerifierDepsCompilerCallbacks()
+  VerifierDepsCompilerCallbacks()
       : CompilerCallbacks(CompilerCallbacks::CallbackMode::kCompileApp),
         deps_(nullptr) {}