fix(tui): remove obsolete $NVIM detection #15791

Initially, we planned to set the NVIM environment variable to detect that
neovim is running in the neovim built-in terminal. At the time this code
was written, there was no way for a parent to set environment variables
for a program running in an embedded terminal. Later it was implemented in
 #12937, but the code to set the NVIM was not added. #11390 now uses ConPTY
instead of winpty when possible, so it is no longer necessary to force the
use of win32con even when running inside an embedded terminal. Therefore,
we now do not need this code.

0 files changed, 0 insertions, 0 deletions