Clean up Bikeshed metadata

- Remove custom "Bug Reports" key, this is added automatically by the
  "Repository" key (i.e. there is a "GitHub" link under "Feedback").
- "Test Suite" is a valid key in Bikeshed, so there is no need to declare it
  as custom. Follow Bikeshed's documentation and provide a URL rather than a
  `<a>` block.
- Remove custom Conformance section, let Bikeshed generate it from `dap`'s
  boilerplate in Bikeshed's spec-data.
- There is no need to explicitly tell Bikeshed not to include an issues
  index, as Bikeshed does not add it due to the lack of an "issues" class in
  CSS.

Author: Raphael Kubo da Costa

index.bs

@@ -23,14 +23,12 @@ Status Text:
   Architecture Group review for this specification to account for the latest
   architectural review practices.
 Version History: https://github.com/w3c/ambient-light/commits/main/index.bs
-!Bug Reports: <a href="https://www.github.com/w3c/ambient-light/issues/new">via the w3c/ambient-light repository on GitHub</a>
 Indent: 2
 Repository: w3c/ambient-light
 Markup Shorthands: markdown on
 Inline Github Issues: off
 !Issue Tracking: <a href="https://github.com/w3c/ambient-light/milestones/Level%202">Level 2 Issues</a>
-!Test Suite: <a href="https://github.com/web-platform-tests/wpt/tree/master/ambient-light">web-platform-tests on GitHub</a>
-Boilerplate: omit issues-index, omit conformance
+Test Suite: https://github.com/web-platform-tests/wpt/tree/master/ambient-light
 Default Biblio Status: current
 </pre>
 <pre class="anchors">
@@ -307,23 +305,3 @@ Paul Bakaus for the LightLevelSensor idea.
 Mikhail Pozdnyakov and Alexander Shalamov for the use cases and requirements.
 
 Lukasz Olejnik for the privacy risk assessment.
-
-Conformance {#conformance}
-===========
-
-Conformance requirements are expressed with a combination of
-descriptive assertions and RFC 2119 terminology. The key words "MUST",
-"MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",
-"RECOMMENDED", "MAY", and "OPTIONAL" in the normative parts of this
-document are to be interpreted as described in RFC 2119.
-However, for readability, these words do not appear in all uppercase
-letters in this specification.
-
-All of the text of this specification is normative except sections
-explicitly marked as non-normative, examples, and notes. [[!RFC2119]]
-
-A <dfn>conformant user agent</dfn> must implement all the requirements
-listed in this specification that are applicable to user agents.
-
-The IDL fragments in this specification must be interpreted as required for
-conforming IDL fragments, as described in the Web IDL specification. [[!WEBIDL]]