Remove repeat and enforce-determinism options

These only functioned if a very narrow combination of conditions held:

- The result path does not yet exist (--check did not result in
  repeated builds), AND
- The result path is not available from any configured substituters, AND
- No remote builders that can build the path are available.

If any of these do not hold, a derivation would be built 0 or 1 times
regardless of the repeat option. Thus, remove it to avoid confusion.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/libmain/progress-bar.cc b/src/libmain/progress-bar.cc
index 961f4e18a..d160a83e9 100644
--- a/src/libmain/progress-bar.cc
+++ b/src/libmain/progress-bar.cc
@@ -180,10 +180,12 @@ public:
             auto machineName = getS(fields, 1);
             if (machineName != "")
                 i->s += fmt(" on " ANSI_BOLD "%s" ANSI_NORMAL, machineName);
-            auto curRound = getI(fields, 2);
-            auto nrRounds = getI(fields, 3);
-            if (nrRounds != 1)
-                i->s += fmt(" (round %d/%d)", curRound, nrRounds);
+
+            // Used to be curRound and nrRounds, but the
+            // implementation was broken for a long time.
+            if (getI(fields, 2) != 1 || getI(fields, 3) != 1) {
+                throw Error("log message indicated repeating builds, but this is not currently implemented");
+            }
             i->name = DrvName(name).name;
         }