[IMP] mail, im_livechat: remove useless guards

Remove useless guards introduced in odoo/odoo#97996.

closes odoo/odoo#98147

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/im_livechat/static/src/models/composer_view.js

@@ -9,7 +9,7 @@ patchRecordMethods('ComposerView', {
      * @override
      */
     _computeDropZoneView() {
-        if (this.composer && this.composer.thread && this.composer.thread.channel && this.composer.thread.channel.channel_type === 'livechat') {
+        if (this.composer.thread && this.composer.thread.channel && this.composer.thread.channel.channel_type === 'livechat') {
             return clear();
         }
         return this._super();

addons/mail/static/src/models/file_uploader.js

@@ -76,7 +76,7 @@ registerModel({
             if (this.chatterOwner) {
                 return replace(this.chatterOwner.thread);
             }
-            if (this.composerView && this.composerView.composer) {
+            if (this.composerView) {
                 return replace(this.composerView.composer.activeThread);
             }
             return clear();