gslice: remove single-threaded case
gslice: remove single-threaded case

GPrivate always works, so use it normally at all times.

tamaskenez/glib,iConsole/Console-OS_external_bluetooth_glib,mzabaluev/glib,MathieuDuponchelle/glib,pstglia/platform-external-bluetooth-glib,bluez-android/glib,cention-sany/glib,iConsole/Console-OS_external_bluetooth_glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,MathieuDuponchelle/glib,bluez-android/glib,pstglia/platform-external-bluetooth-glib,ieei/glib,tchakabam/glib,endlessm/glib,ieei/glib,gale320/glib,01org/android-bluez-glib,krichter722/glib,01org/android-bluez-glib,pstglia/platform-external-bluetooth-glib,krichter722/glib,bluez-android/glib,tamaskenez/glib,tchakabam/glib,mzabaluev/glib,tamaskenez/glib,pstglia/platform-external-bluetooth-glib,mzabaluev/glib,antono/glib,antono/glib,krichter722/glib,01org/android-bluez-glib,justinkb/aosp-bluez.glib,Distrotech/glib,gale320/glib,cosimoc/glib,bluez-android/glib,lukasz-skalski/glib,johne53/MB3Glib,justinkb/aosp-bluez.glib,tamaskenez/glib,endlessm/glib,Distrotech/glib,lukasz-skalski/glib,johne53/MB3Glib,mzabaluev/glib,lukasz-skalski/glib,pstglia/platform-external-bluetooth-glib,endlessm/glib,bluez-android/glib,darren-clark/android_platform_external_bluetooth_glib,djdeath/glib,cosimoc/glib,cention-sany/glib,antono/glib,johne53/MB3Glib,krichter722/glib,tchakabam/glib,darren-clark/android_platform_external_bluetooth_glib,justinkb/aosp-bluez.glib,mzabaluev/glib,cosimoc/glib,Distrotech/glib,pstglia/external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,djdeath/glib,darren-clark/android_platform_external_bluetooth_glib,tchakabam/glib,ieei/glib,01org/android-bluez-glib,johne53/MB3Glib,justinkb/aosp-bluez.glib,pstglia/external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,darren-clark/android_platform_external_bluetooth_glib,Distrotech/glib,MathieuDuponchelle/glib,gale320/glib,cosimoc/glib,Distrotech/glib,cosimoc/glib,MathieuDuponchelle/glib,endlessm/glib,cention-sany/glib,krichter722/glib,djdeath/glib,djdeath/glib,01org/android-bluez-glib,iConsole/Console-OS_external_bluetooth_glib,ieei/glib,lukasz-skalski/glib,MathieuDuponchelle/glib,pstglia/external-bluetooth-glib,tchakabam/glib,cention-sany/glib,cention-sany/glib,justinkb/aosp-bluez.glib,pstglia/external-bluetooth-glib,antono/glib,gale320/glib,darren-clark/android_platform_external_bluetooth_glib,gale320/glib,ieei/glib,djdeath/glib,lukasz-skalski/glib,tamaskenez/glib,pstglia/external-bluetooth-glib