fix: revert exclude non-root README.md/LICENSE files

This was a workaround for a bug that has since been fixed in
ignore-walk.

The test and README were left in place, since the behavior still stands.

This reverts commit 24344a2.

lib/index.js

@@ -38,22 +38,13 @@ const defaults = [
 ]
 
 const strictDefaults = [
-  // these are forcibly excluded
-  '/.git',
-]
-
-const allLevels = [
-  // these are included by default but can be excluded by package.json files array
+  // these are forcibly included at all levels
   '!/readme{,.*[^~$]}',
   '!/copying{,.*[^~$]}',
   '!/license{,.*[^~$]}',
   '!/licence{,.*[^~$]}',
-]
-
-const rootOnly = [
-  /^!.*readme/i,
-  /^!.*copying/i,
-  /^!.*licen[sc]e/i,
+  // these are forcibly excluded
+  '/.git',
 ]
 
 const normalizePath = (path) => path.split('\\').join('/')
@@ -141,7 +132,6 @@ class PackWalker extends IgnoreWalker {
       // known required files for this directory
       this.injectRules(strictRules, [
         ...strictDefaults,
-        ...allLevels,
         ...this.requiredFiles.map((file) => `!${file}`),
       ])
     }
@@ -294,7 +284,6 @@ class PackWalker extends IgnoreWalker {
     const ignores = []
     const strict = [
       ...strictDefaults,
-      ...allLevels,
       '!/package.json',
       '/.git',
       '/node_modules',
@@ -315,9 +304,6 @@ class PackWalker extends IgnoreWalker {
           file = file.slice(0, -2)
         }
         const inverse = `!${file}`
-
-        this.excludeNonRoot(file)
-
         try {
           // if an entry in the files array is a specific file, then we need to include it as a
           // strict requirement for this package. if it's a directory or a pattern, it's a default
@@ -366,20 +352,6 @@ class PackWalker extends IgnoreWalker {
     this.injectRules(strictRules, strict, callback)
   }
 
-  // excludes non root files by checking if elements from the files array in
-  // package.json contain an ! and readme/license/licence/copying, and then
-  // removing readme/license/licence/copying accordingly from strict defaults
-  excludeNonRoot (file) {
-    // Find the pattern
-    const matchingPattern = rootOnly.find(regex => regex.test(file))
-
-    if (matchingPattern) {
-      // Find which index matches the pattern and remove it from allLevels
-      const indexToRemove = allLevels.findIndex(element => matchingPattern.test(element))
-      allLevels.splice(indexToRemove, 1)
-    }
-  }
-
   // custom method: after we've finished gathering the files for the root package, we call this
   // before emitting the 'done' event in order to gather all of the files for bundled deps
   async gatherBundles () {