Remove unused quirk allowing liquid tags to close a block it is nested in (#1284)

test/integration/tags/liquid_tag_test.rb

@@ -82,15 +82,13 @@ class LiquidTagTest < Minitest::Test
   end
 
   def test_nested_liquid_tag
-    assert_usage_increment("liquid_tag_contains_outer_tag", times: 0) do
-      assert_template_result('good', <<~LIQUID)
-        {%- if true %}
-          {%- liquid
-            echo "good"
-          %}
-        {%- endif -%}
-      LIQUID
-    end
+    assert_template_result('good', <<~LIQUID)
+      {%- if true %}
+        {%- liquid
+          echo "good"
+        %}
+      {%- endif -%}
+    LIQUID
   end
 
   def test_cannot_open_blocks_living_past_a_liquid_tag
@@ -102,14 +100,12 @@ class LiquidTagTest < Minitest::Test
     LIQUID
   end
 
-  def test_quirk_can_close_blocks_created_before_a_liquid_tag
-    assert_usage_increment("liquid_tag_contains_outer_tag") do
-      assert_template_result("42", <<~LIQUID)
-        {%- if true -%}
-        42
-        {%- liquid endif -%}
-      LIQUID
-    end
+  def test_cannot_close_blocks_created_before_a_liquid_tag
+    assert_match_syntax_error("syntax error (line 3): 'endif' is not a valid delimiter for liquid tags. use %}", <<~LIQUID)
+      {%- if true -%}
+      42
+      {%- liquid endif -%}
+    LIQUID
   end
 
   def test_liquid_tag_in_raw