doc/go1.19: compiler section is complete, modulo TODOs

For #51400

Change-Id: I964e52e0a36e7bbe77175670e93ce8c99e7dab6d
Reviewed-on: https://go-review.googlesource.com/c/go/+/410367
Reviewed-by: Matthew Dempsky <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Author: aclements

doc/go1.19.html

@@ -185,10 +185,8 @@ <h2 id="compiler">Compiler</h2>
   the <code>go</code> command and by Bazel. Any other build systems
   that invoke the Go compiler directly will need to make sure they
   pass this flag as well.
-
-<p>
-  TODO: complete this section, or delete if not needed
 </p>
+
 <h2 id="linker">Linker</h2>
 <p>
   TODO: complete this section, or delete if not needed