Depending upon the occurence of string 'xyz', I want to remove -t from the input file.
There is not a fixed length input file.
Any suggestions

Input file:

this is xyz line -t of the data
this is line 2 of -t of the data
xyz this is line 3 of -t the file
this is line xyz of the -t file
this is line 5 of the file -t

Ouput file:

this is xyz line of the data
this is line 2 of -t of the data
xyz this is line 3 of the file
this is line xyz of the file
this is line 5 of the file -t