Remove invalid free of pointer into argv array. Fixes #284.

Where the value has been overridden by the user the value pointer will point to memory within the argv array which should not be free'd.

Author: gmartin82

examples/unix/c11/z_pub.c

@@ -113,9 +113,6 @@ int main(int argc, char **argv) {
 
     z_close(z_move(s));
 
-    if (value != default_value) {
-        free(value);
-    }
     return 0;
 }
 #else