Revert "Upgrade to go 1.19 and update dependencies (#3069)" (#3085)

This reverts commit bba7c23957.

vendor/github.com/xrash/smetrics/soundex.go

@@ -1,41 +0,0 @@
-package smetrics
-
-import (
-	"strings"
-)
-
-// The Soundex encoding. It is a phonetic algorithm that considers how the words sound in English. Soundex maps a string to a 4-byte code consisting of the first letter of the original string and three numbers. Strings that sound similar should map to the same code.
-func Soundex(s string) string {
-	m := map[byte]string{
-		'B': "1", 'P': "1", 'F': "1", 'V': "1",
-		'C': "2", 'S': "2", 'K': "2", 'G': "2", 'J': "2", 'Q': "2", 'X': "2", 'Z': "2",
-		'D': "3", 'T': "3",
-		'L': "4",
-		'M': "5", 'N': "5",
-		'R': "6",
-	}
-
-	s = strings.ToUpper(s)
-
-	r := string(s[0])
-	p := s[0]
-	for i := 1; i < len(s) && len(r) < 4; i++ {
-		c := s[i]
-
-		if (c < 'A' || c > 'Z') || (c == p) {
-			continue
-		}
-
-		p = c
-
-		if n, ok := m[c]; ok {
-			r += n
-		}
-	}
-
-	for i := len(r); i < 4; i++ {
-		r += "0"
-	}
-
-	return r
-}