check-templates: Remove prevent_dangling_tags.

This was a misfeature--it occasionally flagged
code that was ugly but necessarily ugly to
ensure proper rendering.

tools/lib/template_parser.py

@@ -338,7 +338,6 @@ def validate(fn: Optional[str] = None, text: Optional[str] = None) -> None:
         )
 
     prevent_whitespace_violations(fn, tokens)
-    prevent_dangling_tags(fn, tokens)
 
     class State:
         def __init__(self, func: Callable[[Token], None]) -> None:
@@ -555,48 +554,6 @@ def prevent_whitespace_violations(fn: str, tokens: List[Token]) -> None:
                 )
 
 
-def prevent_dangling_tags(fn: str, tokens: List[Token]) -> None:
-    """
-    Prevent this kind of HTML:
-
-        <div attr attr
-          attr attr>Stuff</div>
-
-    We prefer:
-        <div attr attr
-          attr attr>
-            Stuff
-        </div>
-
-    We may eventually have the pretty_printer code do this
-    automatically, but there are some complications with
-    legacy code.
-    """
-    min_row: Optional[int] = None
-    for token in tokens:
-        # We only apply this validation for a couple tag types, because
-        # our existing templates may have some funny edge cases.  We eventually
-        # want to be more aggressive here. We may need to be extra careful
-        # with tags like <pre> that have whitespace sensitivities.
-        if token.tag not in ("div", "button", "p"):
-            continue
-        if min_row and token.line < min_row:
-            raise TemplateParserException(
-                f"""
-
-            Please fix line {token.line} at {fn} (col {token.col})
-            by moving this tag so that it closes the block at the
-            same indentation level as its start tag:
-
-                {token.s}
-                """
-            )
-        else:
-            min_row = None
-        if token.line_span > 1:
-            min_row = token.line + token.line_span
-
-
 def is_django_block_tag(tag: str) -> bool:
     return tag in [
         "autoescape",