mlx: Remove peak memory from the API

This is still in flux so it is better to just log it for now.

api/types.go

@@ -15,7 +15,6 @@ import (
 	"github.com/google/uuid"
 
 	"github.com/ollama/ollama/envconfig"
-	"github.com/ollama/ollama/format"
 	"github.com/ollama/ollama/internal/orderedmap"
 	"github.com/ollama/ollama/types/model"
 )
@@ -570,7 +569,6 @@ type DebugInfo struct {
 
 type Metrics struct {
 	TotalDuration      time.Duration `json:"total_duration,omitempty"`
-	PeakMemory         uint64        `json:"peak_memory,omitempty"`
 	LoadDuration       time.Duration `json:"load_duration,omitempty"`
 	PromptEvalCount    int           `json:"prompt_eval_count,omitempty"`
 	PromptEvalDuration time.Duration `json:"prompt_eval_duration,omitempty"`
@@ -936,10 +934,6 @@ func (m *Metrics) Summary() {
 		fmt.Fprintf(os.Stderr, "total duration:       %v\n", m.TotalDuration)
 	}
 
-	if m.PeakMemory > 0 {
-		fmt.Fprintf(os.Stderr, "peak memory:          %s\n", formatPeakMemory(m.PeakMemory))
-	}
-
 	if m.LoadDuration > 0 {
 		fmt.Fprintf(os.Stderr, "load duration:        %v\n", m.LoadDuration)
 	}
@@ -963,14 +957,6 @@ func (m *Metrics) Summary() {
 	}
 }
 
-func formatPeakMemory(b uint64) string {
-	if b >= format.GibiByte {
-		return fmt.Sprintf("%.3f GiB", float64(b)/float64(format.GibiByte))
-	}
-
-	return format.HumanBytes2(b)
-}
-
 func (opts *Options) FromMap(m map[string]any) error {
 	valueOpts := reflect.ValueOf(opts).Elem() // names of the fields in the options struct
 	typeOpts := reflect.TypeOf(opts).Elem()   // types of the fields in the options struct