Remove files_texteditor from shipped apps

Signed-off-by: Julius Härtl <jus@bitgrid.net>

core/shipped.json

@@ -14,7 +14,6 @@
     "files_pdfviewer",
     "files_rightclick",
     "files_sharing",
-    "files_texteditor",
     "files_trashbin",
     "files_versions",
     "files_videoplayer",