clang-tidy: Enable readability-simplify-boolean-expr check

This checks for boolean expressions involving boolean constants
and simplifies them to use the appropriate boolean expression
directly.

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: If2316dc52cbd280971f0333ee805b11e1b99d27f
diff --git a/manager/serialize.cpp b/manager/serialize.cpp
index 64bcadf..e11bb95 100644
--- a/manager/serialize.cpp
+++ b/manager/serialize.cpp
@@ -32,7 +32,7 @@
     // If the name of asserted group exist in the archive and the Asserted
     // property is false, entry is removed from the archive.
     auto iter = savedGroups.find(group);
-    if (iter != savedGroups.end() && asserted == false)
+    if (iter != savedGroups.end() && !asserted)
     {
         savedGroups.erase(iter);
     }