devtools,static: move generated readme styles to unit directory

Change-Id: Iaad83f816f3080fce9a689de8a0f726b5c08cacd
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/344395
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/.stylelintignore b/.stylelintignore
index 50e5c28..97796af 100644
--- a/.stylelintignore
+++ b/.stylelintignore
@@ -1,13 +1,8 @@
 third_party
 
 # Generated readme styles
-content/static/css/readme.css
-static/legacy/css/readme.css
+static/frontend/unit/main/_readme_gen.css
 
 # Worker stylesheet
 content/static/css/worker.css
-static/legacy/css/worker.css
 
-# TODO(https://golang.org/issue/43734): Fix lint errors in stylesheet.css
-content/static/css/stylesheet.css
-static/legacy/css/stylesheet.css
diff --git a/devtools/cmd/css/main.go b/devtools/cmd/css/main.go
index f2de24c..53e517a 100644
--- a/devtools/cmd/css/main.go
+++ b/devtools/cmd/css/main.go
@@ -24,7 +24,7 @@
 )
 
 const (
-	cssFile              = "content/static/css/readme.css"
+	cssFile              = "static/frontend/unit/main/_readme_gen.css"
 	githubStylesheet     = "https://raw.githubusercontent.com/sindresorhus/github-markdown-css/gh-pages/github-markdown.css"
 	githubREADMEClass    = ".markdown-body"
 	discoveryREADMEClass = ".Overview-readmeContent"
diff --git a/static/legacy/css/readme.css b/static/frontend/unit/main/_readme_gen.css
similarity index 100%
rename from static/legacy/css/readme.css
rename to static/frontend/unit/main/_readme_gen.css
diff --git a/static/frontend/unit/main/main.css b/static/frontend/unit/main/main.css
index fd001a7..7ecf9c3 100644
--- a/static/frontend/unit/main/main.css
+++ b/static/frontend/unit/main/main.css
@@ -4,8 +4,6 @@
  * license that can be found in the LICENSE file.
  */
 
-@import url('../../../legacy/css/readme.css');
-
 @import url('./_build-context.css');
 @import url('./_directories.css');
 @import url('./_doc.css');
@@ -13,6 +11,7 @@
 @import url('./_meta.css');
 @import url('./_modals.css');
 @import url('./_outline.css');
+@import url('./_readme_gen.css');
 @import url('./_readme.css');
 
 .UnitDetails {