Fix use of GIT_DIR in zsh configs

Author: AgenttiX

zsh/.zshenv

@@ -9,7 +9,9 @@ else
 fi
 # Symlinking the zsh config folder is not needed thanks to this.
 ZDOTDIR="${GIT_DIR}/linux-scripts/zsh"
-unset GIT_DIR
+
+# GIT_DIR is used in .zshrc and therefore must remain set.
+# unset GIT_DIR
 
 if [ -f "${HOME}/.cargo/env" ]; then
   . "${HOME}/.cargo/env"

zsh/.zshrc

@@ -455,3 +455,5 @@ fi
 if [ -f "${GIT_DIR}/private-scripts/utils.zsh" ]; then
   . "${GIT_DIR}/private-scripts/utils.zsh"
 fi
+
+unset GIT_DIR