Drop unused 1bpp support from Stretch LCD code#792

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JakubVanek wants to merge 2 commits intoev3dev-lang-java:masterfrom

JakubVanek:cleanup/1bpp-lcd

Commits on Jan 9, 2021

cleanup: remove unused 1bpp framebuffer support from stretch display
JakubVanek
committed

Commits on Jan 10, 2021

cleanup: do not use java spi for instantiating rgb framebuffer impl
JakubVanek
committed