dark_mode: Delete unnecessary color setting in TimeView.

Color of |vertical_label_minutes_| will be set through
TimeView::SetTextColorBasedOnSession at
https://cs.chromium.org/chromium/src/ash/system/time/time_view.cc?rcl=3886244ecee4d53af5684b966f679ba9c8838de9&l=115

No need to SetEnabledColor for it anymore.

Bug: 982950
Change-Id: I2d867f9e55c47c42d1ced5da52895bbb6b774857
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1762698Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Min Chen <minch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688737}

ash/system/time/time_view.cc

@@ -39,9 +39,6 @@ namespace {
 // when the timer goes off.
 const int kTimerSlopSeconds = 1;
 
-// Text color of the vertical clock minutes.
-const SkColor kVerticalClockMinuteColor = SkColorSetRGB(0xBA, 0xBA, 0xBA);
-
 // Padding between the left edge of the shelf and the left edge of the vertical
 // clock.
 const int kVerticalClockLeftPadding = 9;
@@ -223,9 +220,6 @@ void TimeView::SetupLabels() {
   SetupLabel(vertical_label_hours_.get());
   vertical_label_minutes_.reset(new views::Label());
   SetupLabel(vertical_label_minutes_.get());
-  // TODO(estade): this should use the NativeTheme's secondary text color. See
-  // crbug.com/687791
-  vertical_label_minutes_->SetEnabledColor(kVerticalClockMinuteColor);
   // Pull the minutes up closer to the hours by using a negative top border.
   vertical_label_minutes_->SetBorder(
       views::CreateEmptyBorder(kVerticalClockMinutesTopOffset, 0, 0, 0));