Revert "Enhanced command line"

src/prolog/machine/system_calls.rs

@@ -3543,15 +3543,6 @@ impl MachineState {
                     unreachable!()
                 }
             }
-            &SystemClauseType::ScryerPrologVersion => {
-                use crate::git_version::git_version;
-                let version = self[temp_v!(1)];
-                let buffer =
-                    git_version!(cargo_prefix = "cargo:", fallback = "unknown");
-                let chars = buffer.chars().map(|c| Addr::Char(c));
-                let result = Addr::HeapCell(self.heap.to_list(chars));
-                self.unify(version, result);
-            }
         };
 
         return_from_clause!(self.last_call, self)