chore(ts-toolbelt): remove deprecated test (microsoft#37932)

Author: millsp

tests/cases/user/ts-toolbelt/index.ts

@@ -12,7 +12,7 @@ type StdRecursiveIteration<T extends any[], I extends I.Iteration = I.IterationO
     I.Pos<I> extends T.Length<T> // this form of recursion is preferred
     ? 1                          // because it will let the user know if                   
     : 0                          // the instantiation depth has been hit
-];                               // (but error is sometimes swallowed (?))
+];
 
 checks([
     check<StdRecursiveIteration<[
@@ -22,23 +22,3 @@ checks([
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     ]>, 40, Test.Pass>(), // max length is 40
 ]);
-
-// iterates over `T` and returns the `Iteration` position when finished
-type SafeRecursiveIteration<T extends any[], I extends I.Iteration = I.IterationOf<'0'>> = {
-    0: SafeRecursiveIteration<T, I.Next<I>>;
-    1: I.Pos<I>;
-}[
-    I.Key<I> extends T.Length<T, 's'> // this form of recursion is the safest
-    ? 1                               // because `T.Length<T, 's'>` will force
-    : 0                               // the length to comply with the limits
-];                                    // => won't compute if excessive length                           
-
-checks([
-    check<SafeRecursiveIteration<[
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    ]>, 0, Test.Pass>() // did not compute
-]);