C++ Remove remains of UninitializedGroup and GroupedMemoryAccess

Author: igfoo

cpp/ql/lib/semmle/code/cpp/ir/implementation/MemoryAccessKind.qll

@@ -13,8 +13,7 @@ private newtype TMemoryAccessKind =
   TPhiMemoryAccess() or
   TUnmodeledMemoryAccess() or
   TChiTotalMemoryAccess() or
-  TChiPartialMemoryAccess() or
-  TGroupedMemoryAccess()
+  TChiPartialMemoryAccess()
 
 /**
  * Describes the set of memory locations memory accessed by a memory operand or
@@ -100,11 +99,3 @@ class ChiTotalMemoryAccess extends MemoryAccessKind, TChiTotalMemoryAccess {
 class ChiPartialMemoryAccess extends MemoryAccessKind, TChiPartialMemoryAccess {
   override string toString() { result = "chi(partial)" }
 }
-
-/**
- * The result of an `UninitializedGroup` instruction, which initializes a set of
- * allocations that are each assigned the same virtual variable.
- */
-class GroupedMemoryAccess extends MemoryAccessKind, TGroupedMemoryAccess {
-  override string toString() { result = "group" }
-}

cpp/ql/lib/semmle/code/cpp/ir/implementation/Opcode.qll

@@ -90,7 +90,6 @@ private newtype TOpcode =
   TSizedBufferMayWriteSideEffect() or
   TInitializeDynamicAllocation() or
   TChi() or
-  TUninitializedGroup() or
   TInlineAsm() or
   TUnreached() or
   TNewObj() or