[NFC] ClangImporter: Remove some redundant hasParameterList calls

Author: AnthonyLatsis

lib/ClangImporter/ClangDerivedConformances.cpp

@@ -81,8 +81,6 @@ static FuncDecl *getInsertFunc(NominalTypeDecl *decl,
   FuncDecl *insert = nullptr;
   for (auto candidate : inserts) {
     if (auto candidateMethod = dyn_cast<FuncDecl>(candidate)) {
-      if (!candidateMethod->hasParameterList())
-        continue;
       auto params = candidateMethod->getParameters();
       if (params->size() != 1)
         continue;
@@ -158,7 +156,7 @@ static ValueDecl *lookupOperator(NominalTypeDecl *decl, Identifier id,
 static ValueDecl *getEqualEqualOperator(NominalTypeDecl *decl) {
   auto isValid = [&](ValueDecl *equalEqualOp) -> bool {
     auto equalEqual = dyn_cast<FuncDecl>(equalEqualOp);
-    if (!equalEqual || !equalEqual->hasParameterList())
+    if (!equalEqual)
       return false;
     auto params = equalEqual->getParameters();
     if (params->size() != 2)
@@ -187,7 +185,7 @@ static FuncDecl *getMinusOperator(NominalTypeDecl *decl) {
 
   auto isValid = [&](ValueDecl *minusOp) -> bool {
     auto minus = dyn_cast<FuncDecl>(minusOp);
-    if (!minus || !minus->hasParameterList())
+    if (!minus)
       return false;
     auto params = minus->getParameters();
     if (params->size() != 2)
@@ -218,7 +216,7 @@ static FuncDecl *getMinusOperator(NominalTypeDecl *decl) {
 static FuncDecl *getPlusEqualOperator(NominalTypeDecl *decl, Type distanceTy) {
   auto isValid = [&](ValueDecl *plusEqualOp) -> bool {
     auto plusEqual = dyn_cast<FuncDecl>(plusEqualOp);
-    if (!plusEqual || !plusEqual->hasParameterList())
+    if (!plusEqual)
       return false;
     auto params = plusEqual->getParameters();
     if (params->size() != 2)