Remove SkTMin and SkTMax

Use std::min and std::max everywhere.

SkTPin still exists. We can't use std::clamp yet, and even when
we can, it has undefined behavior with NaN. SkTPin is written
to ensure that we return a value in the [lo, hi] range.

Change-Id: I506852a36e024ae405358d5078a872e2c77fa71e
Docs-Preview: https://skia.org/?cl=269357
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/269357
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/samplecode/SampleChineseFling.cpp b/samplecode/SampleChineseFling.cpp
index 1cdf784..d16fa06 100644
--- a/samplecode/SampleChineseFling.cpp
+++ b/samplecode/SampleChineseFling.cpp
@@ -191,7 +191,7 @@
             auto paragraphLength = kParagraphLength;
             SkScalar y = 0;
             while (paragraphLength - 45 > 0) {
-                auto currentLineLength = SkTMin(45, paragraphLength - 45);
+                auto currentLineLength = std::min(45, paragraphLength - 45);
                 this->createRandomLine(glyphs, currentLineLength);
 
                 ToolUtils::add_to_text_blob_w_len(&builder,