remove extra ; (llvm#123352)

Remove erroneous extra semicolon in:
llvm#122788

Co-authored-by: ImanHosseini <[email protected]>

Author: ImanHosseini

llvm/lib/Support/APInt.cpp

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