actions: remove unneded API

Author: yoff

actions/ql/lib/codeql/actions/Ast.qll

@@ -242,8 +242,6 @@ class Step extends AstNode instanceof StepImpl {
 
   If getIf() { result = super.getIf() }
 
-  AstNode getUses() { result = super.getUses() }
-
   StepsContainer getContainer() { result = super.getContainer() }
 
   Step getNextStep() { result = super.getNextStep() }

actions/ql/lib/codeql/actions/ast/internal/Ast.qll

@@ -1194,8 +1194,6 @@ class StepImpl extends AstNodeImpl, TStepNode {
   /** Gets the value of the `if` field in this step, if any. */
   IfImpl getIf() { result.getNode() = n.lookup("if") }
 
-  AstNodeImpl getUses() { result.getNode() = n.lookup("uses") }
-
   /** Gets the Runs or LocalJob that this step is in. */
   StepsContainerImpl getContainer() {
     result = this.getParentNode().(RunsImpl) or