fixed unused variable and checker specification

Author: balazske

clang/include/clang/StaticAnalyzer/Checkers/Checkers.td

@@ -208,7 +208,7 @@ def CallAndMessageChecker : Checker<"CallAndMessage">,
 
 def DereferenceModeling : Checker<"DereferenceModeling">,
   HelpText<"General support for dereference related checkers">,
-  Documentation<HasDocumentation>,
+  Documentation<NotDocumented>,
   Hidden;
 
 def NullDereferenceChecker : Checker<"NullDereference">,

clang/lib/StaticAnalyzer/Checkers/DereferenceChecker.cpp

@@ -360,7 +360,7 @@ void ento::registerDereferenceModeling(CheckerManager &Mgr) {
   Mgr.registerChecker<DereferenceChecker>();
 }
 
-bool ento::shouldRegisterDereferenceModeling(const CheckerManager &Mgr) {
+bool ento::shouldRegisterDereferenceModeling(const CheckerManager &) {
   return true;
 }
 
@@ -380,6 +380,6 @@ void ento::registerNullDereferenceChecker(CheckerManager &Mgr) {
                                   categories::LogicError));
 }
 
-bool ento::shouldRegisterNullDereferenceChecker(const CheckerManager &Mgr) {
+bool ento::shouldRegisterNullDereferenceChecker(const CheckerManager &) {
   return true;
 }