Revert "Expose the indirection index"

This reverts commit 6c792e6.

Author: jeongsoolee09

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

@@ -767,11 +767,10 @@ module Public {
    */
   class UninitializedNode extends Node {
     LocalVariable v;
-    int indirectionIndex;
 
     UninitializedNode() {
       exists(SsaImpl::Definition def, SsaImpl::SourceVariable sv |
-        def.getIndirectionIndex() = indirectionIndex and
+        def.getIndirectionIndex() = 0 and
         def.getValue().asInstruction() instanceof UninitializedInstruction and
         SsaImpl::defToNode(this, def, sv) and
         v = sv.getBaseVariable().(SsaImpl::BaseIRVariable).getIRVariable().getAst()
@@ -780,9 +779,6 @@ module Public {
 
     /** Gets the uninitialized local variable corresponding to this node. */
     LocalVariable getLocalVariable() { result = v }
-
-    /** Gets the level of indirection to get to this node. */
-    int getIndirectionIndex() { result = indirectionIndex }
   }
 
   /**