Remove timezone interface from the proposal for shipping Preview 2 (#55)

* remove timezone interface from the proposal

We believe there is value in providing timezone support in this package,
but for the sake of shipping Preview 2, we are out of time to implement
these methods and test a a cross platform implementation of these in two
separate engines.

We intend for this interface to return to the wasi:clocks package and
be made in a post-Preview 2 patch version 0.2.n. Re-introducing this
interface may be done with a revert of this commit once we have shipped
Preview 2 and figured out the process for shipping patch versions.

* generate markdown

Author: pchickey

imports.md

@@ -5,7 +5,6 @@
 <li>interface <a href="#wasi:io_poll"><code>wasi:io/poll</code></a></li>
 <li>interface <a href="#wasi:clocks_monotonic_clock"><code>wasi:clocks/monotonic-clock</code></a></li>
 <li>interface <a href="#wasi:clocks_wall_clock"><code>wasi:clocks/wall-clock</code></a></li>
-<li>interface <a href="#wasi:clocks_timezone"><code>wasi:clocks/timezone</code></a></li>
 </ul>
 </li>
 </ul>
@@ -161,68 +160,3 @@ also known as <a href="https://en.wikipedia.org/wiki/Unix_time">Unix Time</a>.</
 <ul>
 <li><a name="resolution.0"></a> <a href="#datetime"><a href="#datetime"><code>datetime</code></a></a></li>
 </ul>
-<h2><a name="wasi:clocks_timezone">Import interface wasi:clocks/timezone</a></h2>
-<hr />
-<h3>Types</h3>
-<h4><a name="datetime"><code>type datetime</code></a></h4>
-<p><a href="#datetime"><a href="#datetime"><code>datetime</code></a></a></p>
-<p>
-#### <a name="timezone_display">`record timezone-display`</a>
-<p>Information useful for displaying the timezone of a specific <a href="#datetime"><code>datetime</code></a>.</p>
-<p>This information may vary within a single <code>timezone</code> to reflect daylight
-saving time adjustments.</p>
-<h5>Record Fields</h5>
-<ul>
-<li>
-<p><a name="timezone_display.utc_offset"><a href="#utc_offset"><code>utc-offset</code></a></a>: <code>s32</code></p>
-<p>The number of seconds difference between UTC time and the local
-time of the timezone.
-<p>The returned value will always be less than 86400 which is the
-number of seconds in a day (24<em>60</em>60).</p>
-<p>In implementations that do not expose an actual time zone, this
-should return 0.</p>
-</li>
-<li>
-<p><a name="timezone_display.name"><code>name</code></a>: <code>string</code></p>
-<p>The abbreviated name of the timezone to display to a user. The name
-`UTC` indicates Coordinated Universal Time. Otherwise, this should
-reference local standards for the name of the time zone.
-<p>In implementations that do not expose an actual time zone, this
-should be the string <code>UTC</code>.</p>
-<p>In time zones that do not have an applicable name, a formatted
-representation of the UTC offset may be returned, such as <code>-04:00</code>.</p>
-</li>
-<li>
-<p><a name="timezone_display.in_daylight_saving_time"><code>in-daylight-saving-time</code></a>: <code>bool</code></p>
-<p>Whether daylight saving time is active.
-<p>In implementations that do not expose an actual time zone, this
-should return false.</p>
-</li>
-</ul>
-<hr />
-<h3>Functions</h3>
-<h4><a name="display"><code>display: func</code></a></h4>
-<p>Return information needed to display the given <a href="#datetime"><code>datetime</code></a>. This includes
-the UTC offset, the time zone name, and a flag indicating whether
-daylight saving time is active.</p>
-<p>If the timezone cannot be determined for the given <a href="#datetime"><code>datetime</code></a>, return a
-<a href="#timezone_display"><code>timezone-display</code></a> for <code>UTC</code> with a <a href="#utc_offset"><code>utc-offset</code></a> of 0 and no daylight
-saving time.</p>
-<h5>Params</h5>
-<ul>
-<li><a name="display.when"><code>when</code></a>: <a href="#datetime"><a href="#datetime"><code>datetime</code></a></a></li>
-</ul>
-<h5>Return values</h5>
-<ul>
-<li><a name="display.0"></a> <a href="#timezone_display"><a href="#timezone_display"><code>timezone-display</code></a></a></li>
-</ul>
-<h4><a name="utc_offset"><code>utc-offset: func</code></a></h4>
-<p>The same as <a href="#display"><code>display</code></a>, but only return the UTC offset.</p>
-<h5>Params</h5>
-<ul>
-<li><a name="utc_offset.when"><code>when</code></a>: <a href="#datetime"><a href="#datetime"><code>datetime</code></a></a></li>
-</ul>
-<h5>Return values</h5>
-<ul>
-<li><a name="utc_offset.0"></a> <code>s32</code></li>
-</ul>

wit/timezone.wit

@@ -3,5 +3,4 @@ package wasi:clocks;
 world imports {
     import monotonic-clock;
     import wall-clock;
-    import timezone;
 }