doc/go1.15: remove TODOs for tools and go command sections

For #37419

Change-Id: I35a5cf86ff09a3962959627dce58155b26ad4748
Reviewed-on: https://go-review.googlesource.com/c/go/+/236160
Run-TryBot: Jay Conrod <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Bryan C. Mills <[email protected]>
Reviewed-by: Michael Matloob <[email protected]>

Author: Jay Conrod

doc/go1.15.html

@@ -70,10 +70,6 @@ <h3 id="android">Android</h3>
 
 <h2 id="tools">Tools</h2>
 
-<p>
-TODO
-</p>
-
 <h3 id="go-command">Go command</h3>
 
 <p><!-- golang.org/issue/37367 -->
@@ -88,10 +84,6 @@ <h3 id="go-command">Go command</h3>
   back to <code>direct</code> in case of errors.
 </p>
 
-<p>
-TODO
-</p>
-
 <h4 id="go-test"><code>go</code> <code>test</code></h4>
 
 <p><!-- https://golang.org/issue/36134 -->