remove redundant inline casts

ruby/ql/lib/codeql/ruby/controlflow/CfgNodes.qll

@@ -74,7 +74,7 @@ class AstCfgNode extends CfgNode, TElementNode {
   override Location getLocation() { result = n.getLocation() }
 
   final override string toString() {
-    exists(string s | s = n.(AstNode).toString() |
+    exists(string s | s = n.toString() |
       result = "[" + this.getSplitsString() + "] " + s
       or
       not exists(this.getSplitsString()) and result = s

ruby/ql/lib/codeql/ruby/typetracking/TypeTrackerSpecific.qll

@@ -132,7 +132,7 @@ private string getSetterCallAttributeName(AST::SetterMethodCall call) {
 predicate basicLoadStep(Node nodeFrom, Node nodeTo, string content) {
   exists(ExprNodes::MethodCallCfgNode call |
     call.getExpr().getNumberOfArguments() = 0 and
-    content = call.getExpr().(AST::MethodCall).getMethodName() and
+    content = call.getExpr().getMethodName() and
     nodeFrom.asExpr() = call.getReceiver() and
     nodeTo.asExpr() = call
   )