remove unused files

test/cmp_tool/test_read_file8_1.txt

-00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
-11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20

test/cmp_tool/test_read_file8_2.txt

-# test file to the read_file8 function
-00
-01	02
-03 04 05
-06 07 08 09
-
-0A 0B 0C 0D 0E
-0F 10 11 12 13 14
-# skip this line!
-15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 

test/cmp_tool/test_read_file8_3.txt

-# 2nd test file to the read_file8 function
-# to test the error case when data are wrong encoded
-00 01 02 03 04 05
-06 07 08 09 0A 0B
-0C 0D 0E 0F 10 11
-12 13 14 15 16 17
-18 19 1A 1B 1C 1D
-1E1F 20
-#^ this is the wrong formating

test/cmp_tool/test_read_file8_4.txt

-# 2nd test file to the read_file8 function
-# to test the error case when data are wrong encoded
-00 01 02 03 04 05
-06 07 08 09 0A 0B
-0C 0D 0E 0F 10 11
-12 13 14 15 16 17
-18 19 1A 1B 1C 1D
-1L  1F 20
-#^ this is the wrong formating

test/cmp_tool/test_read_file8_5.txt

-