Remove MaxPermSize.
Remove MaxPermSize.

Summary:
As noted by davido in https://github.com/facebook/buck/commit/277a8866e59d53a3faf2e2bb2ddbb1df180fac68#commitcomment-19537270,
this was originally in the else branch of the Java 8 check as Java 8 does not
support it.

Test Plan: CI

Reviewed By: ruibm

fbshipit-source-id: fd07408

illicitonion/buck,dsyang/buck,k21/buck,romanoid/buck,sdwilsh/buck,justinmuller/buck,shs96c/buck,grumpyjames/buck,shybovycha/buck,shs96c/buck,davido/buck,justinmuller/buck,daedric/buck,sdwilsh/buck,zhan-xiong/buck,romanoid/buck,zhan-xiong/buck,nguyentruongtho/buck,marcinkwiatkowski/buck,kageiit/buck,JoelMarcey/buck,davido/buck,facebook/buck,dsyang/buck,Addepar/buck,davido/buck,sdwilsh/buck,romanoid/buck,grumpyjames/buck,dsyang/buck,zhan-xiong/buck,darkforestzero/buck,shs96c/buck,robbertvanginkel/buck,JoelMarcey/buck,justinmuller/buck,Addepar/buck,kageiit/buck,k21/buck,justinmuller/buck,kageiit/buck,SeleniumHQ/buck,dsyang/buck,grumpyjames/buck,davido/buck,JoelMarcey/buck,sdwilsh/buck,robbertvanginkel/buck,vschs007/buck,shs96c/buck,daedric/buck,ilya-klyuchnikov/buck,facebook/buck,zhan-xiong/buck,sdwilsh/buck,LegNeato/buck,kageiit/buck,illicitonion/buck,brettwooldridge/buck,sdwilsh/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,illicitonion/buck,dsyang/buck,marcinkwiatkowski/buck,SeleniumHQ/buck,brettwooldridge/buck,zpao/buck,ilya-klyuchnikov/buck,Addepar/buck,shs96c/buck,Addepar/buck,marcinkwiatkowski/buck,facebook/buck,SeleniumHQ/buck,zhan-xiong/buck,romanoid/buck,clonetwin26/buck,davido/buck,shybovycha/buck,daedric/buck,illicitonion/buck,justinmuller/buck,daedric/buck,clonetwin26/buck,illicitonion/buck,zpao/buck,robbertvanginkel/buck,marcinkwiatkowski/buck,rmaz/buck,ilya-klyuchnikov/buck,shs96c/buck,daedric/buck,k21/buck,k21/buck,shs96c/buck,Addepar/buck,rmaz/buck,shybovycha/buck,daedric/buck,LegNeato/buck,JoelMarcey/buck,SeleniumHQ/buck,shybovycha/buck,justinmuller/buck,justinmuller/buck,Addepar/buck,vschs007/buck,Addepar/buck,zhan-xiong/buck,marcinkwiatkowski/buck,daedric/buck,brettwooldridge/buck,grumpyjames/buck,kageiit/buck,marcinkwiatkowski/buck,illicitonion/buck,clonetwin26/buck,rmaz/buck,clonetwin26/buck,daedric/buck,grumpyjames/buck,davido/buck,brettwooldridge/buck,SeleniumHQ/buck,justinmuller/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,LegNeato/buck,rmaz/buck,rmaz/buck,LegNeato/buck,grumpyjames/buck,robbertvanginkel/buck,JoelMarcey/buck,LegNeato/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,marcinkwiatkowski/buck,LegNeato/buck,zhan-xiong/buck,clonetwin26/buck,davido/buck,vschs007/buck,zpao/buck,daedric/buck,zhan-xiong/buck,romanoid/buck,justinmuller/buck,rmaz/buck,brettwooldridge/buck,SeleniumHQ/buck,brettwooldridge/buck,zpao/buck,shybovycha/buck,sdwilsh/buck,robbertvanginkel/buck,dsyang/buck,robbertvanginkel/buck,k21/buck,Addepar/buck,Addepar/buck,dsyang/buck,vschs007/buck,SeleniumHQ/buck,dsyang/buck,illicitonion/buck,ilya-klyuchnikov/buck,justinmuller/buck,shs96c/buck,facebook/buck,daedric/buck,k21/buck,vschs007/buck,shybovycha/buck,brettwooldridge/buck,sdwilsh/buck,kageiit/buck,k21/buck,illicitonion/buck,darkforestzero/buck,rmaz/buck,LegNeato/buck,darkforestzero/buck,dsyang/buck,clonetwin26/buck,justinmuller/buck,k21/buck,darkforestzero/buck,davido/buck,clonetwin26/buck,romanoid/buck,shybovycha/buck,ilya-klyuchnikov/buck,illicitonion/buck,davido/buck,romanoid/buck,robbertvanginkel/buck,marcinkwiatkowski/buck,romanoid/buck,illicitonion/buck,k21/buck,shs96c/buck,zpao/buck,kageiit/buck,romanoid/buck,facebook/buck,Addepar/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,grumpyjames/buck,robbertvanginkel/buck,nguyentruongtho/buck,shs96c/buck,k21/buck,shybovycha/buck,rmaz/buck,daedric/buck,Addepar/buck,JoelMarcey/buck,nguyentruongtho/buck,LegNeato/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,grumpyjames/buck,vschs007/buck,JoelMarcey/buck,romanoid/buck,sdwilsh/buck,clonetwin26/buck,romanoid/buck,sdwilsh/buck,ilya-klyuchnikov/buck,grumpyjames/buck,shybovycha/buck,illicitonion/buck,sdwilsh/buck,zpao/buck,rmaz/buck,darkforestzero/buck,rmaz/buck,LegNeato/buck,davido/buck,romanoid/buck,brettwooldridge/buck,clonetwin26/buck,davido/buck,zhan-xiong/buck,clonetwin26/buck,LegNeato/buck,Addepar/buck,rmaz/buck,vschs007/buck,brettwooldridge/buck,JoelMarcey/buck,SeleniumHQ/buck,zhan-xiong/buck,grumpyjames/buck,rmaz/buck,robbertvanginkel/buck,brettwooldridge/buck,zpao/buck,k21/buck,zhan-xiong/buck,rmaz/buck,darkforestzero/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,shs96c/buck,shybovycha/buck,Addepar/buck,nguyentruongtho/buck,dsyang/buck,darkforestzero/buck,JoelMarcey/buck,sdwilsh/buck,illicitonion/buck,ilya-klyuchnikov/buck,shybovycha/buck,JoelMarcey/buck,grumpyjames/buck,grumpyjames/buck,k21/buck,brettwooldridge/buck,zhan-xiong/buck,clonetwin26/buck,vschs007/buck,robbertvanginkel/buck,vschs007/buck,shybovycha/buck,illicitonion/buck,dsyang/buck,romanoid/buck,LegNeato/buck,nguyentruongtho/buck,sdwilsh/buck,marcinkwiatkowski/buck,darkforestzero/buck,davido/buck,robbertvanginkel/buck,k21/buck,dsyang/buck,brettwooldridge/buck,nguyentruongtho/buck,marcinkwiatkowski/buck,shs96c/buck,facebook/buck,darkforestzero/buck,SeleniumHQ/buck,daedric/buck,shs96c/buck,JoelMarcey/buck,nguyentruongtho/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,brettwooldridge/buck,vschs007/buck,vschs007/buck,darkfores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