[FIX] stock: do not set useless filters

The filters have no effect and it may be confusing to remove it and see the same
result.
The filters themself will be removed in master.

opw-1832502

addons/stock/report/report_stock_forecast.xml

@@ -45,7 +45,7 @@
         <field name="view_type">form</field>
         <field name="view_mode">pivot,graph</field>
         <field name="search_view_id" ref="view_stock_level_forecast_filter"/>
-        <field name="context">{'search_default_pivot_by':1, 'search_default_graph_by':1, 'search_default_product_tmpl_id': active_id}</field>
+        <field name="context">{'search_default_product_tmpl_id': active_id}</field>
         <field name="view_id" ref="view_stock_level_forecast_pivot"/>
     </record>