remove codes checking for null pointers and assigning them to null af…

…ter released

src/calcwit.cpp

@@ -65,20 +65,13 @@ Circom_CalcWit::Circom_CalcWit (Circom_Circuit *aCircuit, uint maxTh) {
 
 Circom_CalcWit::~Circom_CalcWit() {
   // ...
-  if (inputSignalAssigned != nullptr) {
-    delete[] inputSignalAssigned;
-    inputSignalAssigned = nullptr;
-  }
 
-  if (signalValues != nullptr) {
-    delete[] signalValues;
-    signalValues = nullptr;
-  }
+  delete[] inputSignalAssigned;
+
+  delete[] signalValues;
+
+  delete[] componentMemory;
 
-  if (componentMemory != nullptr) {
-    delete[] componentMemory;
-    componentMemory = nullptr;
-  }
 }
 
 uint Circom_CalcWit::getInputSignalHashPosition(u64 h) {

src/circom.hpp

@@ -42,29 +42,20 @@ struct Circom_Circuit {
 
   ~Circom_Circuit() {
 
-    if (InputHashMap != nullptr) {
-      delete[] InputHashMap;
-      InputHashMap = nullptr;
-    }
+    delete[] InputHashMap;
 
-    if (witness2SignalList != nullptr) {
-      delete[] witness2SignalList;
-      witness2SignalList = nullptr;
-    }
+    delete[] witness2SignalList;
 
-    if (circuitConstants != nullptr) {
-      delete[] circuitConstants;
-      circuitConstants = nullptr;
-    }
+    delete[] circuitConstants;
 
     for (auto &pair : templateInsId2IOSignalInfo) {
       auto *defs = pair.second.defs;
       if (defs != nullptr) {
         delete[] defs->lengths;
         free(defs);
       }
-
     }
+
   }
 };