Remove translation errors

app/src/main/res/values-bg-rBG/strings.xml

@@ -527,10 +527,8 @@
     <string name="CFC_startBefore_text">Начало от: \?</string>
     <string name="default_due_date">Крайна дата по подразбиране</string>
     <string name="default_start_date">Начална дата по подразбиране</string>
-    <string name="cancel">\@android:string/cancel</string>
     <string name="default_tags">Етикети по подразбиране</string>
     <string name="default_recurrence">Повторение по подразбиране</string>
-    <string name="ok">\@android:string/ok</string>
     <string name="display_name">Показвано име</string>
     <string name="share">Споделяне</string>
     <string name="settings_default">По подразбиране</string>

app/src/main/res/values-ro/strings.xml

@@ -18,8 +18,6 @@
     <string name="TEA_control_gcal">calendar</string>
     <string name="export_toast">Ați salvat %1$s la %2$s.</string>
     <string name="actfm_picture_clear">Șterge poza</string>
-    <string name="cancel">\@android:string/cancel</string>
-    <string name="ok">\@android:string/ok</string>
     <string name="markdown_description">Activați Markdown în titlu și descriere</string>
     <string name="markdown">Marcați în jos</string>
     <string name="more_options">Mai multe opțiuni</string>