Revert "Initialize CGC registers to concrete values, and set ECX to the address of the flag page"
Revert "Initialize CGC registers to concrete values, and set ECX to the address of the flag page"

This reverts commit 8042c9a0aad7baba7766730bf67d8b0ceb8df663.

angr/angr,chubbymaggie/angr,iamahuman/angr,angr/angr,tyb0807/angr,angr/angr,tyb0807/angr,iamahuman/angr,axt/angr,tyb0807/angr,f-prettyland/angr,f-prettyland/angr,chubbymaggie/angr,schieb/angr,axt/angr,schieb/angr,f-prettyland/angr,schieb/angr,iamahuman/angr,chubbymaggie/angr,axt/angr