Ignore Firefox components folder during build

After the removal of zotero-service.js for fx115, we no longer have a
`components` folder, so we don't need to shuffle things around to merge
our folder with the one from Firefox.

This fixes a build failure we were getting in CI after #3894.

app/build.sh

@@ -246,7 +246,6 @@ set -e
 cd $omni_dir
 # Move some Firefox files that would be overwritten out of the way
 mv chrome.manifest chrome.manifest-fx
-mv components components-fx
 mv defaults defaults-fx
 
 # Extract Zotero files
@@ -262,13 +261,6 @@ else
 	rsync -a $rsync_params "$SOURCE_DIR/" ./
 fi
 
-#
-# Merge preserved files from Firefox
-#
-# components
-rmdir components
-mv components-fx components
-
 mv defaults defaults-z
 mv defaults-fx defaults
 prefs_file=defaults/preferences/zotero.js