Remove unused file

Signed-off-by: Arthur Silva Sens <arthursens2005@gmail.com>

storage/remote/otlptranslator/prometheus/helpers_from_stdlib.go

@@ -1,106 +0,0 @@
-// Copyright 2024 The Prometheus Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// Provenance-includes-location: https://github.com/golang/go/blob/f2d118fd5f7e872804a5825ce29797f81a28b0fa/src/strings/strings.go
-// Provenance-includes-license: BSD-3-Clause
-// Provenance-includes-copyright: Copyright The Go Authors.
-
-package prometheus
-
-import "strings"
-
-// fieldsFunc is a copy of strings.FieldsFunc from the Go standard library,
-// but it also returns the separators as part of the result.
-func fieldsFunc(s string, f func(rune) bool) ([]string, []string) {
-	// A span is used to record a slice of s of the form s[start:end].
-	// The start index is inclusive and the end index is exclusive.
-	type span struct {
-		start int
-		end   int
-	}
-	spans := make([]span, 0, 32)
-	separators := make([]string, 0, 32)
-
-	// Find the field start and end indices.
-	// Doing this in a separate pass (rather than slicing the string s
-	// and collecting the result substrings right away) is significantly
-	// more efficient, possibly due to cache effects.
-	start := -1 // valid span start if >= 0
-	for end, rune := range s {
-		if f(rune) {
-			if start >= 0 {
-				spans = append(spans, span{start, end})
-				// Set start to a negative value.
-				// Note: using -1 here consistently and reproducibly
-				// slows down this code by a several percent on amd64.
-				start = ^start
-				separators = append(separators, string(s[end]))
-			}
-		} else {
-			if start < 0 {
-				start = end
-			}
-		}
-	}
-
-	// Last field might end at EOF.
-	if start >= 0 {
-		spans = append(spans, span{start, len(s)})
-	}
-
-	// Create strings from recorded field indices.
-	a := make([]string, len(spans))
-	for i, span := range spans {
-		a[i] = s[span.start:span.end]
-	}
-
-	return a, separators
-}
-
-// join is a copy of strings.Join from the Go standard library,
-// but it also accepts a slice of separators to join the elements with.
-// If the slice of separators is shorter than the slice of elements, use a default value.
-// We also don't check for integer overflow.
-func join(elems []string, separators []string, def string) string {
-	switch len(elems) {
-	case 0:
-		return ""
-	case 1:
-		return elems[0]
-	}
-
-	var n int
-	var sep string
-	sepLen := len(separators)
-	for i, elem := range elems {
-		if i >= sepLen {
-			sep = def
-		} else {
-			sep = separators[i]
-		}
-		n += len(sep) + len(elem)
-	}
-
-	var b strings.Builder
-	b.Grow(n)
-	b.WriteString(elems[0])
-	for i, s := range elems[1:] {
-		if i >= sepLen {
-			sep = def
-		} else {
-			sep = separators[i]
-		}
-		b.WriteString(sep)
-		b.WriteString(s)
-	}
-	return b.String()
-}