Dataflow: Make use of defaults for language-specific hooks.

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowDispatch.qll

@@ -79,13 +79,3 @@ class ArgumentPosition extends int {
 /** Holds if arguments at position `apos` match parameters at position `ppos`. */
 pragma[inline]
 predicate parameterMatch(ParameterPosition ppos, ArgumentPosition apos) { ppos = apos }
-
-/**
- * Holds if flow from `call`'s argument `arg` to parameter `p` is permissible.
- *
- * This is a temporary hook to support technical debt in the Go language; do not use.
- */
-pragma[inline]
-predicate golangSpecificParamArgFilter(DataFlowCall call, ParameterNode p, ArgumentNode arg) {
-  any()
-}

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowPrivate.qll

@@ -297,12 +297,3 @@ class ContentApprox = Unit;
 /** Gets an approximated value for content `c`. */
 pragma[inline]
 ContentApprox getContentApprox(Content c) { any() }
-
-/**
- * Gets an additional term that is added to the `join` and `branch` computations to reflect
- * an additional forward or backwards branching factor that is not taken into account
- * when calculating the (virtual) dispatch cost.
- *
- * Argument `arg` is part of a path from a source to a sink, and `p` is the target parameter.
- */
-int getAdditionalFlowIntoCallNodeTerm(ArgumentNode arg, ParameterNode p) { none() }

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowDispatch.qll

@@ -271,13 +271,3 @@ DataFlowCallable viableImplInCallContext(DataFlowCall call, DataFlowCall ctx) {
 /** Holds if arguments at position `apos` match parameters at position `ppos`. */
 pragma[inline]
 predicate parameterMatch(ParameterPosition ppos, ArgumentPosition apos) { ppos = apos }
-
-/**
- * Holds if flow from `call`'s argument `arg` to parameter `p` is permissible.
- *
- * This is a temporary hook to support technical debt in the Go language; do not use.
- */
-pragma[inline]
-predicate golangSpecificParamArgFilter(DataFlowCall call, ParameterNode p, ArgumentNode arg) {
-  any()
-}