Using grep to remove cells instead of lines

I would like to use grep to remove certain strings from a text file but I can't use the grep -v option because it removes the whole line that includes the string whereas I just want to remove the string. How do I go about doing that?

My input file:
Magmas CEU
rs12542019 CPNE1
RBM12 CEU
rs10515181 CPNE1
RBM12 CEU

I want to remove all "CEU" from the txt files so that the output looks like:

Magmas
rs12542019 CPNE1
RBM12
rs10515181 CPNE1
RBM12

---------- Post updated at 08:26 PM ---------- Previous update was at 06:41 PM ----------

deleted

Duplicate.

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