Remove local and outdated excludes from .gitignore

.gitignore

@@ -1,18 +1,5 @@
 target/
 /Cargo.lock
-dev_docs/diagrams
-crates/oq3_syntax/examples/oq3_source
-crates/oq3_syntax/examples/hideold
-organization.md
-parser_design.md
-restorenodes.sh
-restorgenerated.sh
 crates/parser/src/syntax_kind/_syntax_kind_enum.rs
 crates/oq3_syntax/src/ast/generated/_new_nodes.rs
 crates/oq3_syntax/src/ast/generated/_new_tokens.rs        
-.venv/
-.venvs/
-.env/
-.envs/
-.ackrc
-save/