remove IsWarning in tmpl (#26120)

This problem occurs because in #25839, the warning status has been
removed, but there is something in the tmpl that hasn't been changed.
related #25839
close #26118

Author: CaiCandong

templates/repo/issue/view_content/pull.tmpl

@@ -13,7 +13,7 @@
 	{{- else if .IsBlockedByOutdatedBranch}}red
 	{{- else if .IsBlockedByChangedProtectedFiles}}red
 	{{- else if and .EnableStatusCheck (or .RequiredStatusCheckState.IsFailure .RequiredStatusCheckState.IsError)}}red
-	{{- else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
+	{{- else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending)}}yellow
 	{{- else if and .AllowMerge .RequireSigned (not .WillSign)}}red
 	{{- else if .Issue.PullRequest.IsChecking}}yellow
 	{{- else if .Issue.PullRequest.IsEmpty}}grey