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

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

@@ -171,16 +171,6 @@ private module DispatchImpl {
   /** 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()
-  }
 }
 
 import DispatchImpl

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

@@ -593,12 +593,3 @@ predicate containerContent(Content c) {
   c instanceof MapKeyContent or
   c instanceof MapValueContent
 }
-
-/**
- * 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() }