update command line tests

test/cmdlineTests/model_checker_engine_none/input.sol

@@ -1,7 +1,6 @@
 // Removed to yield a warning, otherwise CI test fails with the expectation
 // "no output requested"
 //pragma solidity >=0.0;
-pragma experimental SMTChecker;
 contract test {
     function f(uint x) public pure {
 		assert(x > 0);