Revert "Temporary workaround for event handling serialization issue"
Revert "Temporary workaround for event handling serialization issue"

This reverts commit 2d3a1111caff40ebb87983c861ff548cdc9e5946.
This was based on the assumption that dying threads would automatically
release mutexes, which is not the case.

PersonifyInc/libusbx,AmesianX/libusb,pbatard/libusbx,DirtyUnicorns/android_external_libusbx,byterom/android_external_libusbx,andyvand/libusb,hjelmn/libusbx-temp,legege/libusb,YesVideo/libusb,DirtyUnicorns/android_external_libusbx,tenderlove/libusb,ButterflyNetwork/libusb,DirtyUnicorns/android_external_libusbx,leapmotion/libusb,PersonifyInc/libusbx,LudovicRousseau/libusbx,philemonf/libusb,erhuabushuo/libusb,SimplyComplexCo/libusb,ThirdProject/android_external_libusbx,LudovicRousseau/libusb,anilgit90/libusb,libusb/libusb,dickens/libusb,philemonf/libusb,dickens/libusb,tonyarkles/libusb,RealVNC/libusbx,CyanogenMod/android_external_libusbx,andyvand/libusb,PAC-ROM/android_external_libusbx,wuzhenda/libusb,weizhenwei/libusb,BuLogics/libusb,byterom/android_external_libusbx,weizhenwei/libusb,dickens/libusb,PAC-ROM/android_external_libusbx,weizhenwei/libusb,CyanogenMod/android_external_libusbx,dasdeepak/libusb,kuldeepdhaka/libusb,daiguangbao/libusb,anilgit90/libusb,andyvand/libusb,BuLogics/libusb,RealVNC/libusbx,JENETRIC/libusb,hjelmn/libusbx-temp,wuzhenda/libusb,erhuabushuo/libusb,avakar/libusbx,ndurner/libusbx-suse10,vlovich/libusb,byterom/android_external_libusbx,tonyarkles/libusb,TeamExodus/external_libusbx,Chronic-Dev/libusb,TeamExodus/external_libusbx,hjelmn/libusbx-temp,LightInMotion/libusb,avakar/libusbx,jwrdegoede/libusbx,kuldeepdhaka/libusb,JENETRIC/libusb,hjelmn/libusb-darwin,SimplyComplexCo/libusb,nonolith/libusb,AmesianX/libusb,SpecLad/libusb-android,jwrdegoede/libusbx,erhuabushuo/libusb,bra1nb3am3r/libusb,SpecLad/libusb-android,araisrobo/libusbx,pbatard/libusbx-hp,mojca/libusb_pico,Distrotech/libusb,nonolith/libusb,tklauser/libusb,AmesianX/libusb,dmitrykos/libusb,ButterflyNetwork/libusb,LightInMotion/libusb,araisrobo/libusbx,YesVideo/libusb,SimplyComplexCo/libusb,Chronic-Dev/libusb,ashima/libusb,kuldeepdhaka/libusb,ThirdProject/android_external_libusbx,philemonf/libusb,mojca/libusb_pico,pbatard/libusbx-hp,Senseg/android_external_libusb,ndurner/libusbx-suse10,tklauser/libusb,tklauser/libusb,tonyarkles/libusb,leapmotion/libusb,ashima/libusb,HounD/libusb-v1.0.19,pbatard/libusb-pbatard,PersonifyInc/libusbx,dasdeepak/libusb,ThirdProject/android_external_libusbx,daiguangbao/libusb,dasdeepak/libusb,pbatard/libusb-pbatard,araisrobo/libusbx,anilgit90/libusb,ButterflyNetwork/libusb,Distrotech/libusb,SpecLad/libusb-android,ndurner/libusbx-suse10,YesVideo/libusb,LudovicRousseau/libusbx,pbatard/libusbx-hp,vlovich/libusb,ButterflyNetwork/libusb,manctl/usb,Distrotech/libusb,Senseg/android_external_libusb,HounD/libusb-v1.0.19,nonolith/libusb,BuLogics/libusb,HounD/libusb-v1.0.19,legege/libusb,leapmotion/libusb,dmitrykos/libusb,TeamExodus/external_libusbx,LudovicRousseau/libusb,bra1nb3am3r/libusb,philemonf/libusb,LudovicRousseau/libusb,legege/libusb,LudovicRousseau/libusbx,ButterflyNetwork/libusb,bra1nb3am3r/libusb,bert/libusb,CyanogenMod/android_external_libusbx,dmitrykos/libusb,ashima/libusb,bert/libusb,dmitrykos/libusb,manctl/usb,libusb/libusb,JENETRIC/libusb,libusb/libusb,PAC-ROM/android_external_libusbx,pbatard/libusbx,jwrdegoede/libusbx,hjelmn/libusb-darwin,wuzhenda/libusb,daiguangbao/libusb,tenderlove/libusb