[BOLT] Remove BinaryFunction::IsPatched. NFC (#129461)

BinaryFunction::IsPatched is no longer used.

bolt/include/bolt/Core/BinaryFunction.h

@@ -343,9 +343,6 @@ private:
   /// True if the function uses ORC format for stack unwinding.
   bool HasORC{false};
 
-  /// True if the original entry point was patched.
-  bool IsPatched{false};
-
   /// True if the function contains explicit or implicit indirect branch to its
   /// split fragments, e.g., split jump table, landing pad in split fragment
   bool HasIndirectTargetToSplitFragment{false};
@@ -1376,9 +1373,6 @@ public:
   /// Return true if the function uses ORC format for stack unwinding.
   bool hasORC() const { return HasORC; }
 
-  /// Return true if the original entry point was patched.
-  bool isPatched() const { return IsPatched; }
-
   const JumpTable *getJumpTable(const MCInst &Inst) const {
     const uint64_t Address = BC.MIB->getJumpTable(Inst);
     return getJumpTableContainingAddress(Address);
@@ -1729,8 +1723,6 @@ public:
   /// Mark function that should not be emitted.
   void setIgnored();
 
-  void setIsPatched(bool V) { IsPatched = V; }
-
   void setHasIndirectTargetToSplitFragment(bool V) {
     HasIndirectTargetToSplitFragment = V;
   }

bolt/lib/Passes/PatchEntries.cpp

@@ -130,8 +130,6 @@ Error PatchEntries::runOnFunctions(BinaryContext &BC) {
       assert(!ColdSize && "unexpected cold code");
       assert(HotSize <= PatchSize && "max patch size exceeded");
     }
-
-    Function.setIsPatched(true);
   }
   return Error::success();
 }