Remove rubber duck from BRW, RW and most weapon schemes for now The duck is not liked by players. Rubber duck needs a lot of rework. Before that happens, better remove it from game modes for now. Players can always modify the weapon schemes, of course.

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Lua scripts for engine testing. These scripts are the same as other Lua scripts

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in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or

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`EndLuaTest(TEST_FAILED)` when the test is completed.