Ruby: clean up docs

Author: nickrolfe

CONTRIBUTING.md

@@ -11,13 +11,14 @@ If you have an idea for a query that you would like to share with other CodeQL u
 
 1. **Directory structure**
 
-    There are five language-specific query directories in this repository:
+    There are six language-specific query directories in this repository:
 
       * C/C++: `cpp/ql/src`
       * C#: `csharp/ql/src`
       * Java: `java/ql/src`
       * JavaScript: `javascript/ql/src`
       * Python: `python/ql/src`
+      * Ruby: `ruby/ql/src`
 
     Each language-specific directory contains further subdirectories that group queries based on their `@tags` or purpose.
     - Experimental queries and libraries are stored in the `experimental` subdirectory within each language-specific directory in the [CodeQL repository](https://github.com/github/codeql). For example, experimental Java queries and libraries are stored in `java/ql/src/experimental` and any corresponding tests in `java/ql/test/experimental`.

ruby/CONTRIBUTING.md

@@ -1,50 +1,14 @@
 # Ruby analysis support for CodeQL
 
-This open-source repository contains the extractor, CodeQL libraries, and queries that power Ruby
+This directory contains the extractor, CodeQL libraries, and queries that power Ruby
 support in [LGTM](https://lgtm.com) and the other CodeQL products that [GitHub](https://github.com)
 makes available to its customers worldwide.
 
 It contains two major components:
-  - an extractor, written in Rust, that parses Ruby source code and converts it into a database
-    that can be queried using CodeQL.
-  - static analysis libraries and queries written in [CodeQL](https://codeql.github.com/docs/) that can be
-    used to analyze such a database to find coding mistakes or security vulnerabilities.
-
-The goal of this project is to provide comprehensive static analysis support for Ruby in CodeQL.
-
-For the queries and libraries that power CodeQL support for other languages, visit [the CodeQL
-repository](https://github.com/github/codeql).
-
-## Installation
-
-Simply clone this repository. There are no external dependencies.
-
-If you want to use the CodeQL extension for Visual Studio Code, import this repository into your VS
-Code workspace.
-
-## Usage
-
-To analyze a Ruby codebase, either use the [CodeQL command-line
-interface](https://codeql.github.com/docs/codeql-cli/) to create a database yourself, or
-download a pre-built database from [LGTM.com](https://lgtm.com/). You can then run any of the
-queries contained in this repository either on the command line or using the VS Code extension.
-
-Note that the [lgtm.com](https://github.com/github/codeql-ruby/tree/lgtm.com) branch of this
-repository corresponds to the version of the queries that is currently deployed on LGTM.com.
-The [main](https://github.com/github/codeql-ruby/tree/main) branch may contain changes that
-have not been deployed yet, so you may need to upgrade databases downloaded from [LGTM.com](https://lgtm.com) before
-running queries on them.
-
-## Contributions
-
-Contributions are welcome! Please see our [contribution guidelines](CONTRIBUTING.md) and our
-[code of conduct](CODE_OF_CONDUCT.md) for details on how to participate in our community.
-
-## Licensing
-
-The code in this repository is licensed under the [MIT license](LICENSE).
-
-## Resources
-
-- [Writing CodeQL queries](https://codeql.github.com/docs/writing-codeql-queries/)
-- [CodeQL documentation](https://codeql.github.com/docs/)
+  1. static analysis libraries and queries written in
+     [CodeQL](https://codeql.github.com/docs/) that can be used to analyze such
+     a database to find coding mistakes or security vulnerabilities.
+  2. an extractor, written in Rust, that parses Ruby source code and converts it
+     into a database that can be queried using CodeQL. See [Developer
+     information](doc/HOWTO.md) for information on building the extractor (you
+     do not need to do this if you are only developing queries).