[LAA] Remove unused RuntimeCheckingPtrGroup constructor (NFC).

The constructor is not used. Remove it.

llvm/include/llvm/Analysis/LoopAccessAnalysis.h

@@ -336,12 +336,6 @@ struct RuntimeCheckingPtrGroup {
   /// pointer, with index \p Index in RtCheck.
   RuntimeCheckingPtrGroup(unsigned Index, RuntimePointerChecking &RtCheck);
 
-  RuntimeCheckingPtrGroup(unsigned Index, const SCEV *Start, const SCEV *End,
-                          unsigned AS)
-      : High(End), Low(Start), AddressSpace(AS) {
-    Members.push_back(Index);
-  }
-
   /// Tries to add the pointer recorded in RtCheck at index
   /// \p Index to this pointer checking group. We can only add a pointer
   /// to a checking group if we will still be able to get