remove extra ; (#123352)

Remove erroneous extra semicolon in:
https://github.com/llvm/llvm-project/pull/122788

Co-authored-by: ImanHosseini <imanhosseini.17@gmail.com>

llvm/lib/Support/APInt.cpp

@@ -3125,4 +3125,4 @@ APInt APIntOps::pow(const APInt &X, int64_t N) {
     Acc *= Base;
   }
   return Acc;
-};
+}