Enable unused variable warnings and resolve

This commit enables the "unused variables" warning in clang.  Throughout
this, it did point out several issues that would've been functional
bugs, so I think it was worthwhile.  It also cleaned up several unused
variable from old constructs that no longer exist.

Tested:
Built with clang.  Code no longer emits warnings.

Downloaded bmcweb to system and pulled up the webui, observed webui
loads and logs in properly.

Change-Id: I51505f4222cc147d6f2b87b14d7e2ac4a74cafa8
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/redfish-core/lib/sensors.hpp b/redfish-core/lib/sensors.hpp
index d1895c4..ac98735 100644
--- a/redfish-core/lib/sensors.hpp
+++ b/redfish-core/lib/sensors.hpp
@@ -304,7 +304,7 @@
     auto objectsWithConnectionCb =
         [callback](const boost::container::flat_set<std::string>& connections,
                    const std::set<std::pair<std::string, std::string>>&
-                       objectsWithConnection) {
+                   /*objectsWithConnection*/) {
             callback(std::move(connections));
         };
     getObjectsWithConnection(SensorsAsyncResp, sensorNames,
@@ -2770,7 +2770,7 @@
         // Get the connection to which the memberId belongs
         auto getObjectsWithConnectionCb =
             [sensorAsyncResp, overrideMap](
-                const boost::container::flat_set<std::string>& connections,
+                const boost::container::flat_set<std::string>& /*connections*/,
                 const std::set<std::pair<std::string, std::string>>&
                     objectsWithConnection) {
                 if (objectsWithConnection.size() != overrideMap.size())
@@ -3012,7 +3012,7 @@
     }
 
   private:
-    void doGet(crow::Response& res, const crow::Request& req,
+    void doGet(crow::Response& res, const crow::Request&,
                const std::vector<std::string>& params) override
     {
         BMCWEB_LOG_DEBUG << "SensorCollection doGet enter";
@@ -3084,7 +3084,7 @@
     }
 
   private:
-    void doGet(crow::Response& res, const crow::Request& req,
+    void doGet(crow::Response& res, const crow::Request&,
                const std::vector<std::string>& params) override
     {
         BMCWEB_LOG_DEBUG << "Sensor doGet enter";