all: use built-in max/min to simplify the code

Change-Id: Ic195ff4df3749050079c85739f61897279933268
Reviewed-on: https://go-review.googlesource.com/c/text/+/664816
Auto-Submit: Sean Liao <[email protected]>
Reviewed-by: Sean Liao <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Mark Freeman <[email protected]>

Author: cuishuang

secure/precis/enforce_test.go

@@ -92,13 +92,6 @@ func TestTransformMallocs(t *testing.T) {
 	}
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 // TestTransformerShortBuffers tests that the precis.Transformer implements the
 // spirit, not just the letter (the method signatures), of the
 // transform.Transformer interface.

unicode/bidi/core.go

@@ -427,13 +427,6 @@ type isolatingRunSequence struct {
 
 func (i *isolatingRunSequence) Len() int { return len(i.indexes) }
 
-func maxLevel(a, b level) level {
-	if a > b {
-		return a
-	}
-	return b
-}
-
 // Rule X10, second bullet: Determine the start-of-sequence (sos) and end-of-sequence (eos) types,
 // either L or R, for each isolating run sequence.
 func (p *paragraph) isolatingRunSequence(indexes []int) *isolatingRunSequence {
@@ -474,8 +467,8 @@ func (p *paragraph) isolatingRunSequence(indexes []int) *isolatingRunSequence {
 		indexes: indexes,
 		types:   types,
 		level:   level,
-		sos:     typeForLevel(maxLevel(prevLevel, level)),
-		eos:     typeForLevel(maxLevel(succLevel, level)),
+		sos:     typeForLevel(max(prevLevel, level)),
+		eos:     typeForLevel(max(succLevel, level)),
 	}
 }