Revert "chore: Implement docs site (eslint#15815)"

This reverts commit d6e2036.

.gitignore

@@ -1,5 +1,4 @@
 /node_modules
-/docs/node_modules
 test.js
 coverage/
 build/
@@ -27,6 +26,3 @@ versions.json
 yarn.lock
 package-lock.json
 pnpm-lock.yaml
-
-# Docs site output
-_site

Makefile.js

@@ -622,18 +622,10 @@ target.gensite = function(prereleaseVersion) {
 
     // 3. Copy docs folder to a temporary directory
     echo("> Copying the docs folder (Step 3)");
-    docFiles.forEach(filePath => {
-        const pathToCopy = path.join("docs/src", filePath, "*"),
-            tempPath = path.join(TEMP_DIR, filePath);
-
-        if (!test("-d", tempPath)) {
-            mkdir(tempPath);
-        }
-
-        cp("-rf", pathToCopy, tempPath);
-    });
+    cp("-rf", "docs/src/*", TEMP_DIR);
 
     // special case (for now)
+    cp("-f", "docs/src/pages/index.md", path.join(TEMP_DIR, "index.md"));
     rm("-rf", path.join(TEMP_DIR, "pages"));
 
     let versions = test("-f", "./versions.json") ? JSON.parse(cat("./versions.json")) : {};