[release-branch.go1] doc/install: we don't print 'The compiler is 6g' anymore

««« backport 008b163fb38a
doc/install: we don't print 'The compiler is 6g' anymore

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6273050

»»»

doc/install-source.html

@@ -170,7 +170,6 @@ ALL TESTS PASSED
 Installed Go for linux/amd64 in /home/you/go.
 Installed commands in /home/you/go/bin.
 *** You need to add /home/you/go/bin to your $PATH. ***
-The compiler is 6g.
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