Install golang via homebrew instead of gvm (Go Version Manager)

install.sh

@@ -102,10 +102,6 @@ install_nvm () {
   git_clone 'https://github.com/creationix/nvm.git' "$TARGET/.nvm"
 }
 
-install_gvm () {
-  git_clone 'https://github.com/moovweb/gvm.git' "$TARGET/.gvm"
-}
-
 install_rustup () {
   curl https://sh.rustup.rs -sSf | sh
 }
@@ -161,9 +157,6 @@ case "$1" in
   nvm)
     install_nvm
     ;;
-  gvm)
-    install_gvm
-    ;;
   rustup)
     install_rustup
     ;;