Regex search and replace End Of line

[Herb Martin]

I know this must be easy but have yet to find it in
help:

Goal:  Search for pattern at end of line and remove the
pattern INCLUDING the line termination.

(Tried using several of the replace-regex functions
unsuccessfully.)

example--------------------------------------------------------
test text etc test text =
some stuff
test text etc test text =
some stuff
test text etc test text =
some stuff
-------------------result---------------------------------------
test text etc test text some stuff
test text etc test text some stuff
test text etc test text some stuff
----------------------------------------------------------------

FYI, it was mangled by email encoding.
--
Herb Martin