Revert "fixes #9940; genericAssign does not take care of the importC variables in refc [backport] (#23761)"

This reverts commit fda43d1f0a.

compiler/ccgtypes.nim

@@ -1246,7 +1246,7 @@ proc genObjectInfo(m: BModule, typ, origType: PType, name: Rope; info: TLineInfo
   else:
     genTypeInfoAuxBase(m, typ, origType, name, rope("0"), info)
   var tmp = getNimNode(m)
-  if (not isImportedType(typ)) or tfCompleteStruct in typ.flags:
+  if not isImportedType(typ):
     genObjectFields(m, typ, origType, typ.n, tmp, info)
   m.s[cfsTypeInit3].addf("$1.node = &$2;$n", [tiNameForHcr(m, name), tmp])
   var t = typ[0]

tests/ccgbugs/tcgbug.nim

@@ -4,7 +4,6 @@ success
 M1 M2
 ok
 '''
-matrix: "--mm:refc;--mm:orc"
 """
 
 type
@@ -133,30 +132,3 @@ proc foo = # bug #23280
   doAssert L mod 6 == 0 
 
 foo()
-
-block: # bug #9940
-  {.emit:"""/*TYPESECTION*/
-typedef struct { int base; } S;
-""".}
-
-  type S {.importc: "S", completeStruct.} = object
-    base: cint
-  proc init(x:ptr S) =
-    x.base = 1
-
-  type
-    Foo = object
-      a: seq[float]
-      b: seq[float]
-      c: seq[float]
-      d: seq[float]
-      s: S
-
-  proc newT(): Foo =
-    var t: Foo
-    t.s.addr.init
-    doAssert t.s.base == 1
-    t
-
-  var t = newT()
-  doAssert t.s.base == 1