remove yr_finalize_thread from docs (#972)
remove yr_finalize_thread from docs (#972)

update documentation to not require any threads to call yr_finalize_thread anymore
wxsBSD/yara,cblichmann/yara,pombredanne/yara,hillu/yara,hillu/yara,VirusTotal/yara,pombredanne/yara,plusvic/yara,pombredanne/yara,VirusTotal/yara,cblichmann/yara,wxsBSD/yara,hillu/yara,wxsBSD/yara,hillu/yara,plusvic/yara,hillu/yara,pombredanne/yara,wxsBSD/yara,plusvic/yara,cblichmann/yara,cblichmann/yara,VirusTotal/yara,wxsBSD/yara,plusvic/yara,cblichmann/yara,pombredanne/yara,VirusTotal/yara,VirusTotal/yara,plusvic/yara