drnim: tiny progress (#13882)

* drnim: tiny progress
* refactoring complete
* drnim: prove .ensures annotations
* Moved code around to avoid code duplication
* drnim: first implementation of the 'old' property
* drnim: be precise about the assignment statement
* first implementation of --assumeUnique
* progress on forall/exists handling

compiler/nim.nim

@@ -33,20 +33,6 @@ when defined(profiler) or defined(memProfiler):
   {.hint: "Profiling support is turned on!".}
   import nimprof
 
-proc prependCurDir(f: AbsoluteFile): AbsoluteFile =
-  when defined(unix):
-    if os.isAbsolute(f.string): result = f
-    else: result = AbsoluteFile("./" & f.string)
-  else:
-    result = f
-
-proc addCmdPrefix*(result: var string, kind: CmdLineKind) =
-  # consider moving this to std/parseopt
-  case kind
-  of cmdLongOption: result.add "--"
-  of cmdShortOption: result.add "-"
-  of cmdArgument, cmdEnd: discard
-
 proc processCmdLine(pass: TCmdLinePass, cmd: string; config: ConfigRef) =
   var p = parseopt.initOptParser(cmd)
   var argsCount = 0