blast_repo fixes (dart-lang/string_scanner#83)

drop-lint

pkgs/string_scanner/analysis_options.yaml

diff --git a/pkgs/string_scanner/analysis_options.yaml b/pkgs/string_scanner/analysis_options.yaml
index 813466b..59f763a 100644
--- a/pkgs/string_scanner/analysis_options.yaml
+++ b/pkgs/string_scanner/analysis_options.yaml
@@ -22,7 +22,6 @@
     - missing_whitespace_between_adjacent_strings
     - no_adjacent_strings_in_list
     - no_runtimeType_toString
-    - package_api_docs
     - prefer_const_declarations
     - prefer_expression_function_bodies
     - prefer_final_locals