docs/install/client: remove Go 1.2 note
docs/install/client: remove Go 1.2 note

Go 1.2 is out there.

tsuru/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,ggarnier/tsuru,cezarsa/tsuru,hcxiong/tsuru,mderaldo/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,RichardKnop/tsuru,tuxmonteiro/tsuru,jblancett/tsuru,RichardKnop/tsuru,ggarnier/tsuru,4eek/tsuru,cgvarela/tsuru,cezarsa/tsuru,mderaldo/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,4eek/tsuru,hcxiong/tsuru,gwmoura/tsuru,ggarnier/tsuru,tsuru/tsuru,ArxdSilva/tsuru,4eek/tsuru,mderaldo/tsuru,cezarsa/tsuru,RichardKnop/tsuru,gwmoura/tsuru,kgrvamsi/tsuru,jblancett/tsuru,kgrvamsi/tsuru,hugoantunes/tsuru,ArxdSilva/tsuru,Endika/tsuru,hcxiong/tsuru,Endika/tsuru,cgvarela/tsuru,firebitsbr/tsuru,guilhermebr/tsuru,Endika/tsuru,tsuru/tsuru,jblancett/tsuru,gciotta/tsuru,ggarnier/tsuru,hugoantunes/tsuru,kgrvamsi/tsuru,gciotta/tsuru,cgvarela/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,gciotta/tsuru,firebitsbr/tsuru,tsuru/tsuru,cezarsa/tsuru,gwmoura/tsuru