Remove issue references in tests

tests/Fixtures/regression/3321-block-function-parent-override.test

@@ -1,28 +0,0 @@
---TEST--
-#3321 block() resolves nested block() calls against the overriding template even when going through parent()
---TEMPLATE--
-{{ block('block1', 'theme.html.twig') }}
---TEMPLATE(theme.html.twig)--
-{% extends 'base.html.twig' %}
-
-{%- block block1 -%}
-    {{- parent() -}}
-    BLOCK1THEME/
-{%- endblock -%}
-
-{%- block block2 -%}
-    BLOCK2THEME/
-{%- endblock -%}
---TEMPLATE(base.html.twig)--
-{%- block block1 -%}
-    BLOCK1BASE/
-    {{- block('block2') -}}
-{%- endblock -%}
-
-{%- block block2 -%}
-    BLOCK2BASE/
-{%- endblock -%}
---DATA--
-return []
---EXPECT--
-BLOCK1BASE/BLOCK2THEME/BLOCK1THEME/

tests/Fixtures/regression/block-inheritance-issue.test

@@ -1,5 +1,5 @@
 --TEST--
-#4701 Accessing arrays with stringable objects as key
+Accessing arrays with stringable objects as key
 --TEMPLATE--
 {% set hash = {
   'foo': 'FOO',

tests/Fixtures/regression/iterator_to_array.test

@@ -1,5 +1,5 @@
 --TEST--
-#4029 When use_yield is true, CaptureNode fall in iterator_to_array pitfall regarding index overwrite
+When use_yield is true, CaptureNode fall in iterator_to_array pitfall regarding index overwrite
 --TEMPLATE--
 {%- set tmp -%}
   {%- block foo 'foo' -%}