Remove unnecessary, incorrect workaround.

The "\printf" calls zsh shell builtin instead of `command printf` in scripting.

The workaround is no longer needed given 91a29c0.

nvm.sh

@@ -13,13 +13,7 @@
 NVM_SCRIPT_SOURCE="$_"
 
 nvm_echo() {
-  command printf %s\\n "$*" 2>/dev/null || {
-    nvm_echo() {
-      # shellcheck disable=SC1001
-      \printf %s\\n "$*" # on zsh, `command printf` sometimes fails
-    }
-    nvm_echo "$@"
-  }
+  command printf %s\\n "$*" 2>/dev/null
 }
 
 nvm_cd() {