Remove dependency on Selectors and refactor codebase.

Change-Id: Ic3024b76ba0eea61f790c91c36090b4aa68702a3
Refs: #4522
diff --git a/src/handles/command-base-handle.cpp b/src/handles/command-base-handle.cpp
index 1717839..8f2c6d0 100644
--- a/src/handles/command-base-handle.cpp
+++ b/src/handles/command-base-handle.cpp
@@ -32,7 +32,7 @@
 static ndn::optional<std::string>
 getSignerFromTag(const ndn::Interest& interest)
 {
-  shared_ptr<SignerTag> signerTag = interest.getTag<SignerTag>();
+  std::shared_ptr<SignerTag> signerTag = interest.getTag<SignerTag>();
   if (signerTag == nullptr) {
     return ndn::nullopt;
   }
@@ -62,13 +62,10 @@
 
       auto signer1 = getSignerFromTag(request);
       std::string signer = signer1.value_or("*");
-      //_LOG_DEBUG("accept " << request->getName() << " signer=" << signer);
       accept(signer);
     },
     [reject] (const ndn::Interest& request,
               const ndn::security::v2::ValidationError& error) {
-      //_LOG_DEBUG("reject " << request->getName() << " signer=" <<
-      //              getSignerFromTag(*request).value_or("?") << ' ' << failureInfo);
       reject(ndn::mgmt::RejectReply::STATUS403);
     });
   };