Editorial: remove the nonexistent controller variable

Fetch params's controller still exists, but is initialized upon creation.

Author: jeremyroman

fetch.bs

@@ -3883,7 +3883,6 @@ the request.
  <li><p>Let <var>fetchParams</var> be a new <a for=/>fetch params</a> whose
  <a for="fetch params">request</a> is <var>request</var>,
  <a for="fetch params">timing info</a> is <var>timingInfo</var>,
- <a for="fetch params">controller</a> is <var>controller</var>,
  <a for="fetch params">process request body chunk length</a> is
  <var>processRequestBodyChunkLength</var>,
  <a for="fetch params">process request end-of-body</a> is <var>processRequestEndOfBody</var>,
@@ -8325,6 +8324,7 @@ Jeff Carpenter,
 Jeff Hodges,
 Jeffrey Yasskin,
 Jensen Chappell,
+Jeremy Roman,
 Jesse M. Heines,
 Jianjun Chen,
 Jinho Bang,