Revert "fixes #16790; fixes #19075; put big arrays on the constant seqs; don't inline them in the VM; big performance boost (#21318)"

This reverts commit 7ad8c44e28.

compiler/vmgen.nim

@@ -30,7 +30,7 @@
 import tables
 
 import
-  strutils, ast, types, msgs, renderer, vmdef, trees,
+  strutils, ast, types, msgs, renderer, vmdef,
   intsets, magicsys, options, lowerings, lineinfos, transf, astmsgs
 
 from modulegraphs import getBody
@@ -2131,10 +2131,7 @@ proc gen(c: PCtx; n: PNode; dest: var TDest; flags: TGenFlags = {}) =
       genLit(c, n, dest)
     of skConst:
       let constVal = if s.ast != nil: s.ast else: s.typ.n
-      if dontInlineConstant(n, constVal):
-        genLit(c, constVal, dest)
-      else:
-        gen(c, constVal, dest)
+      gen(c, constVal, dest)
     of skEnumField:
       # we never reach this case - as of the time of this comment,
       # skEnumField is folded to an int in semfold.nim, but this code

tests/vm/t19075.nim

@@ -1,19 +0,0 @@
-discard """
-  timeout: 10
-  joinable: false
-"""
-
-# bug #19075
-const size = 50_000
-
-const stuff = block:
-    var a: array[size, int]
-    a
-
-const zeugs = block:
-    var zeugs: array[size, int]
-    for i in 0..<size:
-        zeugs[i] = stuff[i]
-    zeugs
-
-doAssert zeugs[0] == 0