Remove testutils (#13435) [backport]

lib/pure/collections/tables.nim

@@ -776,11 +776,12 @@ iterator allValues*[A, B](t: Table[A, B]; key: A): B =
   ## `add proc<#add,Table[A,B],A,B>`_).
   ##
   runnableExamples:
-    import testutils
+    import sequtils, algorithm
+
     var a = {'a': 3, 'b': 5}.toTable
     for i in 1..3: a.add('z', 10*i)
-    doAssert a.sortedPairs == @[('a', 3), ('b', 5), ('z', 10), ('z', 20), ('z', 30)]
-    doAssert sortedItems(a.allValues('z')) == @[10, 20, 30]
+    doAssert toSeq(a.pairs).sorted == @[('a', 3), ('b', 5), ('z', 10), ('z', 20), ('z', 30)]
+    doAssert sorted(toSeq(a.allValues('z'))) == @[10, 20, 30]
 
   let hc = genHash(key)
   var h: Hash = hc and high(t.data)

lib/pure/testutils.nim

@@ -1,15 +0,0 @@
-## Utilities to help writing tests
-##
-## Unstable, experimental API.
-
-import std/[sequtils, algorithm]
-
-proc sortedPairs*[T](t: T): auto =
-  ## helps when writing tests involving tables in a way that's robust to
-  ## changes in hashing functions / table implementation.
-  toSeq(t.pairs).sorted
-
-template sortedItems*(t: untyped): untyped =
-  ## helps when writing tests involving tables in a way that's robust to
-  ## changes in hashing functions / table implementation.
-  sorted(toSeq(t))

tests/collections/ttables.nim

@@ -8,7 +8,10 @@ And we get here
 '''
 joinable: false
 """
-import hashes, sequtils, tables, algorithm, testutils
+import hashes, sequtils, tables, algorithm
+
+proc sortedPairs[T](t: T): auto = toSeq(t.pairs).sorted
+template sortedItems(t: untyped): untyped = sorted(toSeq(t))
 
 block tableDollar:
   # other tests should use `sortedPairs` to be robust to future table/hash

tests/collections/ttablesthreads.nim

@@ -3,7 +3,9 @@ discard """
   output: '''true'''
 """
 
-import hashes, tables, sharedtables, testutils
+import hashes, tables, sharedtables, algorithm, sequtils
+
+proc sortedPairs[T](t: T): auto = toSeq(t.pairs).sorted
 
 const
   data = {