remove state.is_not_first_logical_line

Ignoring all lines until the first logical line does not match the
behavior from pycodestyle.

Fixes #10374

crates/ruff_linter/src/rules/pycodestyle/rules/blank_lines.rs

@@ -696,9 +696,7 @@ impl<'a> BlankLinesChecker<'a> {
             state.class_status.update(&logical_line);
             state.fn_status.update(&logical_line);
 
-            if state.is_not_first_logical_line {
-                self.check_line(&logical_line, &state, prev_indent_length, diagnostics);
-            }
+            self.check_line(&logical_line, &state, prev_indent_length, diagnostics);
 
             match logical_line.kind {
                 LogicalLineKind::Class => {
@@ -733,8 +731,6 @@ impl<'a> BlankLinesChecker<'a> {
             }
 
             if !logical_line.is_comment_only {
-                state.is_not_first_logical_line = true;
-
                 state.last_non_comment_line_end = logical_line.logical_line_end;
 
                 if logical_line.indent_length == 0 {
@@ -994,8 +990,6 @@ struct BlankLinesState {
     follows: Follows,
     fn_status: Status,
     class_status: Status,
-    /// First line that is not a comment.
-    is_not_first_logical_line: bool,
     /// Used for the fix in case a comment separates two non-comment logical lines to make the comment "stick"
     /// to the second line instead of the first.
     last_non_comment_line_end: TextSize,