Move PassingExample to its own file

Missed this one when moving code around before.

spec/helpers/passing_example.cr

@@ -0,0 +1,23 @@
+# Example that always succeeds.
+class PassingExample < Spectator::RunnableExample
+  # Dummy description.
+  def what
+    "PASS"
+  end
+
+  # Run the example that always passes.
+  # If this doesn't something broke.
+  private def run_instance
+    report_expectations(1, 0)
+  end
+
+  # Creates a passing example.
+  def self.create
+    hooks = Spectator::ExampleHooks.empty
+    group = Spectator::RootExampleGroup.new(hooks)
+    values = Spectator::Internals::SampleValues.empty
+    new(group, values).tap do |example|
+      group.children = [example.as(Spectator::ExampleComponent)]
+    end
+  end
+end

spec/helpers/spy_sut.cr

@@ -10,27 +10,3 @@ class SpySUT
     true
   end
 end
-
-# Example that always succeeds.
-class PassingExample < Spectator::RunnableExample
-  # Dummy description.
-  def what
-    "PASS"
-  end
-
-  # Run the example that always passes.
-  # If this doesn't something broke.
-  private def run_instance
-    report_expectations(1, 0)
-  end
-
-  # Creates a passing example.
-  def self.create
-    hooks = Spectator::ExampleHooks.empty
-    group = Spectator::RootExampleGroup.new(hooks)
-    values = Spectator::Internals::SampleValues.empty
-    new(group, values).tap do |example|
-      group.children = [example.as(Spectator::ExampleComponent)]
-    end
-  end
-end