remove noop option gc:v2 (#19810)

* remove noop option gc:v2

* changelog

compiler/ccgstmts.nim

@@ -16,7 +16,7 @@ const
     # above X strings a hash-switch for strings is generated
 
 proc getTraverseProc(p: BProc, v: PSym): Rope =
-  if p.config.selectedGC in {gcMarkAndSweep, gcHooks, gcV2, gcRefc} and
+  if p.config.selectedGC in {gcMarkAndSweep, gcHooks, gcRefc} and
       optOwnedRefs notin p.config.globalOptions and
       containsGarbageCollectedRef(v.loc.t):
     # we register a specialized marked proc here; this has the advantage

compiler/ccgtypes.nim

@@ -1483,12 +1483,12 @@ proc genTypeInfoV1(m: BModule, t: PType; info: TLineInfo): Rope =
       genTupleInfo(m, x, x, result, info)
   of tySequence:
     genTypeInfoAux(m, t, t, result, info)
-    if m.config.selectedGC in {gcMarkAndSweep, gcRefc, gcV2, gcGo}:
+    if m.config.selectedGC in {gcMarkAndSweep, gcRefc, gcGo}:
       let markerProc = genTraverseProc(m, origType, sig)
       m.s[cfsTypeInit3].addf("$1.marker = $2;$n", [tiNameForHcr(m, result), markerProc])
   of tyRef:
     genTypeInfoAux(m, t, t, result, info)
-    if m.config.selectedGC in {gcMarkAndSweep, gcRefc, gcV2, gcGo}:
+    if m.config.selectedGC in {gcMarkAndSweep, gcRefc, gcGo}:
       let markerProc = genTraverseProc(m, origType, sig)
       m.s[cfsTypeInit3].addf("$1.marker = $2;$n", [tiNameForHcr(m, result), markerProc])
   of tyPtr, tyRange, tyUncheckedArray: genTypeInfoAux(m, t, t, result, info)

compiler/commands.nim

@@ -262,7 +262,6 @@ proc testCompileOptionArg*(conf: ConfigRef; switch, arg: string, info: TLineInfo
     of "go": result = conf.selectedGC == gcGo
     of "none": result = conf.selectedGC == gcNone
     of "stack", "regions": result = conf.selectedGC == gcRegions
-    of "v2", "generational": warningOptionNoop(arg)
     else: localError(conf, info, errNoneBoehmRefcExpectedButXFound % arg)
   of "opt":
     case arg.normalize
@@ -568,7 +567,6 @@ proc processMemoryManagementOption(switch, arg: string, pass: TCmdLinePass,
       unregisterArcOrc(conf)
       conf.selectedGC = gcRegions
       defineSymbol(conf.symbols, "gcregions")
-    of "v2": warningOptionNoop(arg)
     else: localError(conf, info, errNoneBoehmRefcExpectedButXFound % arg)
 
 proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;

compiler/options.nim

@@ -183,7 +183,6 @@ type
     gcMarkAndSweep = "markAndSweep"
     gcHooks = "hooks"
     gcRefc = "refc"
-    gcV2 = "v2"
     gcGo = "go"
     # gcRefc and the GCs that follow it use a write barrier,
     # as far as usesWriteBarrier() is concerned