remove supportLibraryVersion
remove supportLibraryVersion

is no more used after switch to AndroidX

tobiasge/cgeo,auricgoldfinger/cgeo,auricgoldfinger/cgeo,tobiasge/cgeo,rsudev/c-geo-opensource,rsudev/c-geo-opensource,auricgoldfinger/cgeo,matej116/cgeo,cgeo/cgeo,cgeo/cgeo,S-Bartfast/cgeo,S-Bartfast/cgeo,tobiasge/cgeo,S-Bartfast/cgeo,matej116/cgeo,cgeo/cgeo,matej116/cgeo,rsudev/c-geo-opensource,cgeo/cgeo