chore: refactor by removing a couple variables (#20)

Author: styfle

lib/detect-libc.js

@@ -56,18 +56,6 @@ const RE_GLIBC_VERSION = /GLIBC\s(\d+\.\d+)/;
  */
 const MUSL = 'musl';
 
-/**
- * This string is used to find if the {@link LDD_PATH} is GLIBC
- * @type {string}
- */
-const GLIBC_ON_LDD = GLIBC.toUpperCase();
-
-/**
- * This string is used to find if the {@link LDD_PATH} is musl
- * @type {string}
- */
-const MUSL_ON_LDD = MUSL.toLowerCase();
-
 const isFileMusl = (f) => f.includes('libc.musl-') || f.includes('ld-musl-');
 
 const familyFromReport = () => {
@@ -95,10 +83,10 @@ const familyFromCommand = (out) => {
 };
 
 const getFamilyFromLddContent = (content) => {
-  if (content.includes(MUSL_ON_LDD)) {
+  if (content.includes('musl')) {
     return MUSL;
   }
-  if (content.includes(GLIBC_ON_LDD)) {
+  if (content.includes('GLIBC')) {
     return GLIBC;
   }
   return null;