Remove unsupported ja_JP translations

locale/ja_JP.po

@@ -1,55 +0,0 @@
-#
-msgid ""
-msgstr "Content-Type: text/plain; charset=utf-8\n"
-
-msgctxt "field:product.product.cost_history,cost_price:"
-msgid "Cost Price"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,create_date:"
-msgid "Create Date"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,create_uid:"
-msgid "Create User"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,date:"
-msgid "Date"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,id:"
-msgid "ID"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,product:"
-msgid "Product"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,rec_name:"
-msgid "Record Name"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,write_date:"
-msgid "Write Date"
-msgstr ""
-
-msgctxt "field:product.product.cost_history,write_uid:"
-msgid "Write User"
-msgstr ""
-
-msgctxt "model:ir.action,name:act_product_cost_history_form"
-msgid "Product Cost History"
-msgstr "Product Cost History"
-
-msgctxt "model:product.product.cost_history,name:"
-msgid "History of Product Cost"
-msgstr ""
-
-msgctxt "view:product.product.cost_history:"
-msgid "Time"
-msgstr ""
-
-msgctxt "model:ir.action,name:wizard_product_cost_history_open"
-msgid "Cost History"
-msgstr "Cost History"