Remove duplicated install_system_packages function (#140)

Author: SergioGasquez

install-rust-toolchain.sh

@@ -427,22 +427,6 @@ function install_system_packages() {
     fi
 }
 
-function install_system_packages() {
-    if [ -z "${SYSTEM_PACKAGES}" ]; then
-        return
-    fi
-
-    echo "Installing system packages: ${SYSTEM_PACKAGES}"
-
-    if [[ ${ARCH} == "aarch64-apple-darwin" || ${ARCH} == "x86_64-apple-darwin" ]]; then
-        command -v brew || {
-            echo "Warning: Unable to find command brew. Skipping installation of system package."
-            return
-        }
-        brew list "${SYSTEM_PACKAGES}" || brew install "${SYSTEM_PACKAGES}"
-    fi
-}
-
 # Check required tooling - rustc, rustfmt
 command -v rustup || install_rustup