remove W>H startup rotation (#1128)
remove W>H startup rotation (#1128)

* remove W>H startup rotation

It was broken (only the FB was rotated not the touch) and prevents using a W>H device

this keeps `isAlwaysPortrait()` for devices that have a bad starting orientation (can be set in the emulator with EMULATE_READER_FORCE_PORTRAIT)

to test try `kodev run -h=600 -w=800`. Fixes: koreader/koreader#5910 may need koreader/koreader#6309 to be complete

* remove setScreenMode nothing uses it

* remove uneeded require
NiLuJe/koreader-base,koreader/koreader-base,koreader/koreader-base,Frenzie/koreader-base,koreader/koreader-base,NiLuJe/koreader-base,NiLuJe/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,Frenzie/koreader-base,Frenzie/koreader-base,Frenzie/koreader-base