perf(document): remove unnecessary reset logic

Re: Automattic#14897
Re: Automattic#10295

Author: vkarpov15

lib/document.js

@@ -3484,44 +3484,9 @@ Document.prototype.$__reset = function reset() {
   // Skip for subdocuments
   const subdocs = !this.$isSubdocument ? this.$getAllSubdocs() : null;
   if (subdocs && subdocs.length > 0) {
-    const resetArrays = new Set();
     for (const subdoc of subdocs) {
-      const fullPathWithIndexes = subdoc.$__fullPathWithIndexes();
       subdoc.$__reset();
-      if (this.isModified(fullPathWithIndexes) || isParentInit(fullPathWithIndexes)) {
-        if (subdoc.$isDocumentArrayElement) {
-          resetArrays.add(subdoc.parentArray());
-        } else {
-          const parent = subdoc.$parent();
-          if (parent === this) {
-            this.$__.activePaths.clearPath(subdoc.$basePath);
-          } else if (parent != null && parent.$isSubdocument) {
-            // If map path underneath subdocument, may end up with a case where
-            // map path is modified but parent still needs to be reset. See gh-10295
-            parent.$__reset();
-          }
-        }
-      }
     }
-
-    for (const array of resetArrays) {
-      this.$__.activePaths.clearPath(array.$path());
-      array[arrayAtomicsBackupSymbol] = array[arrayAtomicsSymbol];
-      array[arrayAtomicsSymbol] = {};
-    }
-  }
-
-  function isParentInit(path) {
-    path = path.indexOf('.') === -1 ? [path] : path.split('.');
-    let cur = '';
-    for (let i = 0; i < path.length; ++i) {
-      cur += (cur.length ? '.' : '') + path[i];
-      if (_this.$__.activePaths[cur] === 'init') {
-        return true;
-      }
-    }
-
-    return false;
   }
 
   // clear atomics