helloweb: Don't set which Go to use for the build

Component should not change a global setting like Go/Python/GCC version.
Only leaf software-releases can.

component/helloweb/buildout.cfg

@@ -30,8 +30,6 @@ revision      = a7c788ae71
 install =
     ${helloweb:location}/go:./...
 
-golang  = ${golang1.16:location}
-
 # -*- go -*-
 [helloweb-go]
 # we already have gowork/bin/helloweb with helloweb Go build.