Revert "Convert verification errors into diagnostics, closes #14768"

This reverts commit 2dc3d27.

This solution will still leave a corrupted state if
verification is manually aborted.

Author: josevalim

lib/elixir/lib/module/parallel_checker.ex

@@ -283,21 +283,7 @@ defmodule Module.ParallelChecker do
       |> emit_warnings(file, log?)
 
     Enum.each(after_verify, fn {verify_mod, verify_fun} ->
-      try do
-        apply(verify_mod, verify_fun, [module])
-      catch
-        # We need to catch exceptions because files have already been written to disk,
-        # so we need to convert verification errors into diagnostics by using IO.warn.
-        kind, reason ->
-          IO.warn(
-            "exception happened while verifying module #{inspect(module)}\n\n" <>
-              Exception.format(kind, reason, __STACKTRACE__),
-            file: file,
-            line: line,
-            module: verify_mod,
-            function: {verify_fun, 1}
-          )
-      end
+      apply(verify_mod, verify_fun, [module])
     end)
 
     diagnostics

lib/elixir/test/elixir/module/types/integration_test.exs

@@ -1225,27 +1225,6 @@ defmodule Module.Types.IntegrationTest do
 
       assert_warnings(files, warning)
     end
-
-    test "converts errors into diagnostics" do
-      files = %{
-        "a.ex" => """
-        defmodule A do
-          @after_verify __MODULE__
-
-          def __after_verify__(__MODULE__) do
-            raise "oops"
-          end
-        end
-        """
-      }
-
-      warning = [
-        "warning: exception happened while verifying module A",
-        "** (RuntimeError) oops"
-      ]
-
-      assert_warnings(files, warning)
-    end
   end
 
   describe "deprecated" do