blast_repo fixes (#1452)

This PR contains changes created by the blast repo tool.

- `drop-lint`

analysis_options.yaml

@@ -19,12 +19,10 @@ linter:
     - literal_only_boolean_expressions
     - missing_whitespace_between_adjacent_strings
     - no_runtimeType_toString
-    - package_api_docs
     - prefer_const_declarations
     - prefer_expression_function_bodies
     - prefer_final_locals
     - sort_child_properties_last
     - unnecessary_breaks
-    - unsafe_html
     - use_full_hex_values_for_flutter_colors
     - use_string_buffers