C++: remove unneeded predicate

Author: Robert Marsh

cpp/ql/src/semmle/code/cpp/models/implementations/Iterator.qll

@@ -93,8 +93,6 @@ class IteratorPointerDereferenceOperator extends Operator, TaintFunction, Iterat
     input = iteratorInput and
     output.isReturnValue()
   }
-
-  override FunctionInput getIteratorInput() { result = iteratorInput }
 }
 
 /**
@@ -179,8 +177,6 @@ class IteratorPointerDereferenceMemberOperator extends MemberFunction, TaintFunc
     this.getDeclaringType() instanceof Iterator
   }
 
-  override FunctionInput getIteratorInput() { result.isQualifierObject() }
-
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     input.isQualifierObject() and
     output.isReturnValue()
@@ -276,8 +272,6 @@ class IteratorArrayMemberOperator extends MemberFunction, TaintFunction, Iterato
     input.isQualifierObject() and
     output.isReturnValue()
   }
-
-  override FunctionInput getIteratorInput() { result.isQualifierObject() }
 }
 
 /**

cpp/ql/src/semmle/code/cpp/models/interfaces/Iterator.qll

@@ -15,5 +15,4 @@ import semmle.code.cpp.models.Models
  * can be used to write to the iterator's underlying collection.
  */
 abstract class IteratorReferenceFunction extends Function {
-  abstract FunctionInput getIteratorInput();
 }