Remove obsolete code from env.groovy. Replaced by bash env builder.
Remove obsolete code from env.groovy. Replaced by bash env builder.

nobeans/gvm-cli,DealerDotCom/gvm-cli,jbovet/gvm,busches/gvm-cli,skpal/sdkman-cli,gvmtool/gvm-cli,shanman190/sdkman-cli,GsusRecovery/sdkman-cli,sdkman/sdkman-cli,GsusRecovery/sdkman-cli,nobeans/gvm-cli,skpal/sdkman-cli,DealerDotCom/gvm-cli