remove unused utilities (signalfx#3687)

internal/signalfx-agent/pkg/utils/set.go

@@ -1,20 +1,5 @@
 package utils
 
-// UniqueStrings returns a slice with the unique set of strings from the input
-func UniqueStrings(strings []string) []string {
-	unique := map[string]struct{}{}
-	for _, v := range strings {
-		unique[v] = struct{}{}
-	}
-
-	keys := make([]string, 0)
-	for k := range unique {
-		keys = append(keys, k)
-	}
-
-	return keys
-}
-
 // StringSliceToMap converts a slice of strings into a map with keys from the slice
 func StringSliceToMap(strings []string) map[string]bool {
 	// Use bool so that the user can do `if setMap[key] { ... }``
@@ -37,17 +22,6 @@ func StringSetToSlice(set map[string]bool) []string {
 	return out
 }
 
-// MergeStringSets merges 2+ string map sets into a single output map.
-func MergeStringSets(sets ...map[string]bool) map[string]bool {
-	out := map[string]bool{}
-	for _, ss := range sets {
-		for k, v := range ss {
-			out[k] = v
-		}
-	}
-	return out
-}
-
 // StringSet creates a map set from vararg
 func StringSet(strings ...string) map[string]bool {
 	return StringSliceToMap(strings)

internal/signalfx-agent/pkg/utils/slice.go

@@ -1,29 +1,5 @@
 package utils
 
-// MakeRange creates an int slice containing all ints between `min` and `max`
-func MakeRange(min, max int) []int {
-	a := make([]int, max-min+1)
-	for i := range a {
-		a[i] = min + i
-	}
-	return a
-}
-
-// InterfaceSliceToStringSlice returns a new slice that contains the elements
-// of `is` as strings.  Returns nil if any of the elements of `is` are not
-// strings.
-func InterfaceSliceToStringSlice(is []interface{}) []string {
-	var ss []string
-	for _, intf := range is {
-		if s, ok := intf.(string); ok {
-			ss = append(ss, s)
-		} else {
-			return nil
-		}
-	}
-	return ss
-}
-
 // RemoveAllElementsFromStringSlice removes all elements from toRemove that exists
 // in inputStrings
 func RemoveAllElementsFromStringSlice(inputStrings []string, toRemoveStrings []string) []string {