The test function in noexcept default contract violation test should not be noexcept

Author: villevoutilainen

gcc/testsuite/g++.dg/contracts/cpp26/contract-violation-noexcept.C

@@ -83,7 +83,7 @@ void my_term()
   catch(...) { std::exit(0); }
 }
 
-void f(int x) noexcept pre(x >= 0)
+void f(int x) pre(x >= 0)
 {
   try{
    int i = 1;