meson support: remove code warnings 2

This commit contains code changes necessary to support the increased
warning level from Meson builds. Most changes are for unused variables.
to keep the review size manageable, this commit contains only control
changes (plus one in sensor-monitor).

Change-Id: Ie20f1d9028add4b605e4cc9fb230940710365706
Signed-off-by: Mike Capps <mikepcapps@gmail.com>
diff --git a/control/json/triggers/init.cpp b/control/json/triggers/init.cpp
index 6556fdc..7452584 100644
--- a/control/json/triggers/init.cpp
+++ b/control/json/triggers/init.cpp
@@ -138,8 +138,8 @@
     }
 }
 
-enableTrigger triggerInit(const json& jsonObj, const std::string& eventName,
-                          std::vector<std::unique_ptr<ActionBase>>& actions)
+enableTrigger triggerInit(const json& jsonObj, const std::string& /*eventName*/,
+                          std::vector<std::unique_ptr<ActionBase>>& /*actions*/)
 {
     // Get the method handler if configured
     auto handler = methods.end();
diff --git a/control/json/triggers/parameter.cpp b/control/json/triggers/parameter.cpp
index 3abe57c..6f4eac3 100644
--- a/control/json/triggers/parameter.cpp
+++ b/control/json/triggers/parameter.cpp
@@ -26,7 +26,7 @@
 
 enableTrigger
     triggerParameter(const json& jsonObj, const std::string& eventName,
-                     std::vector<std::unique_ptr<ActionBase>>& actions)
+                     std::vector<std::unique_ptr<ActionBase>>& /*actions*/)
 {
     if (!jsonObj.contains("parameter"))
     {
@@ -38,8 +38,8 @@
 
     auto name = jsonObj["parameter"].get<std::string>();
 
-    return [name](const std::string& eventName, Manager* mgr,
-                  const std::vector<Group>& groups,
+    return [name](const std::string& /*eventName*/, Manager* /*mgr*/,
+                  const std::vector<Group>& /*groups*/,
                   std::vector<std::unique_ptr<ActionBase>>& actions) {
         Manager::addParameterTrigger(name, actions);
     };
diff --git a/control/json/triggers/signal.cpp b/control/json/triggers/signal.cpp
index 9f7caa3..10a42d6 100644
--- a/control/json/triggers/signal.cpp
+++ b/control/json/triggers/signal.cpp
@@ -192,7 +192,7 @@
                                        SignalObject(), actions};
                 // If signal match already exists, then the service will be the
                 // same so add action to be run
-                auto isSameSig = [](SignalPkg& pkg) { return true; };
+                auto isSameSig = [](SignalPkg&) { return true; };
 
                 subscribe(match, std::move(signalPkg), isSameSig, mgr);
                 grpServices.emplace_back(serv);
@@ -220,7 +220,7 @@
     SignalPkg signalPkg = {Handlers::member, SignalObject(), actions};
     // If signal match already exists, then the member signal will be the
     // same so add action to be run
-    auto isSameSig = [](SignalPkg& pkg) { return true; };
+    auto isSameSig = [](SignalPkg&) { return true; };
 
     // Groups are optional, but a signal triggered event with no groups
     // will do nothing since signals require a group
@@ -235,8 +235,9 @@
     }
 }
 
-enableTrigger triggerSignal(const json& jsonObj, const std::string& eventName,
-                            std::vector<std::unique_ptr<ActionBase>>& actions)
+enableTrigger
+    triggerSignal(const json& jsonObj, const std::string& eventName,
+                  std::vector<std::unique_ptr<ActionBase>>& /*actions*/)
 {
     auto subscriber = signals.end();
     if (jsonObj.contains("signal"))
@@ -262,7 +263,7 @@
     }
 
     return [subscriber = std::move(subscriber),
-            jsonObj](const std::string& eventName, Manager* mgr,
+            jsonObj](const std::string& /*eventName*/, Manager* mgr,
                      const std::vector<Group>& groups,
                      std::vector<std::unique_ptr<ActionBase>>& actions) {
         TriggerActions signalActions;
diff --git a/control/json/triggers/timer.cpp b/control/json/triggers/timer.cpp
index e04bdd0..ce8bba7 100644
--- a/control/json/triggers/timer.cpp
+++ b/control/json/triggers/timer.cpp
@@ -81,8 +81,9 @@
     return false;
 }
 
-enableTrigger triggerTimer(const json& jsonObj, const std::string& eventName,
-                           std::vector<std::unique_ptr<ActionBase>>& actions)
+enableTrigger
+    triggerTimer(const json& jsonObj, const std::string& /*eventName*/,
+                 std::vector<std::unique_ptr<ActionBase>>& /*actions*/)
 {
     // Get the type and interval of this timer from the JSON
     auto type = getType(jsonObj);