Docs: Remove some Semmle references.

CONTRIBUTING.md

@@ -21,7 +21,7 @@ Follow the steps below to help other users understand what your query does, and
 
 3. **Make sure your query has the correct metadata**
 
-   Query metadata is used by Semmle's analysis to identify your query and make sure the query results are displayed properly. 
+   Query metadata is used to identify your query and make sure the query results are displayed properly.
    The most important metadata to include are the `@name`, `@description`, and the `@kind`.
    Other metadata properties (`@precision`, `@severity`, and `@tags`) are usually added after the query has been reviewed by the maintainers.
    For more information on writing query metadata, see the [Query metadata style guide](https://github.com/Semmle/ql/blob/master/docs/query-metadata-style-guide.md).

README.md

@@ -1,7 +1,8 @@
 # Go analysis support for CodeQL
 
 This open-source repository contains the extractor, CodeQL libraries, and queries that power Go
-support in [LGTM](https://lgtm.com), CodeQL, and other Semmle products.
+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, itself written in Go, that parses Go source code and converts it into a database