Kotlin: Apply some review feedback

java/ql/consistency-queries/cfgDeadEnds.ql

@@ -4,8 +4,6 @@ import semmle.code.java.ControlFlowGraph
 predicate shouldBeDeadEnd(ControlFlowNode n) {
   n instanceof BreakStmt and n.getFile().isKotlinSourceFile() // TODO
   or
-  n instanceof ReturnStmt and n.getFile().isKotlinSourceFile() // TODO
-  or
   n instanceof Interface // TODO
   or
   n instanceof Class // TODO

java/ql/consistency-queries/children.ql

@@ -46,8 +46,7 @@ predicate gapInChildren(Element e, int i) {
 
 predicate lateFirstChild(Element e, int i) {
   i > 0 and
-  exists(nthChildOf(e, i)) and
-  forex(int j | exists(nthChildOf(e, j)) | j >= i) and
+  i = min(int j | exists(nthChildOf(e, j))) and
   // A wildcard type access can be `?` with no children,
   // `? extends T` with only a child 0, or `? super T`
   // with only a child 1.

java/ql/lib/semmle/code/java/Expr.qll

@@ -3,7 +3,7 @@
  */
 
 import java
-import semmle.code.java.frameworks.android.Compose
+private import semmle.code.java.frameworks.android.Compose
 
 /** A common super-class that represents all kinds of expressions. */
 class Expr extends ExprParent, @expr {
@@ -2349,10 +2349,9 @@ class Argument extends Expr {
    */
   predicate isNthVararg(int arrayindex) {
     not this.isExplicitVarargsArray() and
-    exists(Callable tgt, Parameter varargsParam, int varargsParamPos |
+    exists(Callable tgt, int varargsParamPos |
       call.getCallee() = tgt and
-      tgt.getParameter(varargsParamPos) = varargsParam and
-      varargsParam.isVarargs() and
+      tgt.getParameter(varargsParamPos).isVarargs() and
       arrayindex = pos - varargsParamPos and
       arrayindex >= 0 and
       arrayindex <= (call.getNumArgument() - tgt.getNumberOfParameters())

java/ql/lib/semmle/code/java/frameworks/android/Compose.qll

@@ -9,8 +9,6 @@ import java
  * This always returns a constant expression and can be considered as such.
  */
 class LiveLiteral extends MethodAccess {
-  CompileTimeConstantExpr value;
-
   LiveLiteral() {
     this.getMethod() instanceof LiveLiteralMethod and
     not this.getEnclosingCallable() instanceof LiveLiteralMethod