Delete ChromeOS code

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1926163002

Review-Url: https://codereview.chromium.org/1926163002
diff --git a/gyp/freetype.gyp b/gyp/freetype.gyp
index d68d33a..6ebd168 100644
--- a/gyp/freetype.gyp
+++ b/gyp/freetype.gyp
@@ -33,7 +33,7 @@
           }, { # (not skia_freetype_static)
             # dynamic linking depends on the OS:
             'conditions': [
-              [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "chromeos"]',
+              [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris"]',
                 {
                   'direct_dependent_settings': {
                     'include_dirs' : [