Remove unecessary code from Site.upload()
Remove unecessary code from Site.upload()

Handling requests exceptions is the responsibility of `Site.raw_call()`,
not `Site.upload()`

mwclient/mwclient,ubibene/mwclient,JeroenDeDauw/mwclient,danmichaelo/mwclient,PierreSelim/mwclient,AdamWill/mwclient,Jobava/mirror-mwclient