Revert "tests: Add a test that 'rehash' isn't run."
Revert "tests: Add a test that 'rehash' isn't run."

This reverts commit 62c5575848f1f0a96161243d18497c247c9f52df.

The test fails when zsh/parameter is available.

zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting