Revert "examples sequences ikaros"

This reverts commit 82c5ff15.

Those files are not used anymore and were there for tests purposes. This
commit should not have been merged.

ikzf1_example_1.fa

->del4-7__jonction_intron3_intron7
-TGTGAAGGTCACACCCTCTGGTCTTCTCCCAGCCCATAGGGTATAAATAATCTGAATTGACGGCATCCAGGGATCTCAGAAcccgcgTCAAGTCTAGTGTAACTGTTTCTTCTTCAAGGTGATTTGCATTTTATTCCTGAATGCCTGAGGGTTCTTT
-

ikzf1_example_2.fa

->del2-7__jonction_intron1var_intron7
-CAtACACTTCAAGATTATGCATTTATTAACAGATACATGAAATAAATTCCATGTGCATATGCACATATGCACACAGAGCGTGCACACACACAGCATGCACACAGCGTGGAGTGAGAGGCATGGGGCAGTGTGGAAGAGTTTTAACATCAAACAGACCTGAAATGAGTATTAAAGGCCCCCTTTATTTTTAAACTTTTACTAAAACAAGATGGATTTCCCTATGTTATATAATGGTGAATTTTAGGCATAAATAACGTTTTTTGAGTGTTGCATAATTGTACGTATTAATGTAATGTAACTGTGGTTAACGAAGAATTCATCAAGGATATCACTGTTTTGTGGCATTTTTTTTTTCCTCCTCTAATCTTTGGACTTGTGAAATAATTTCACTATGAAATAAATGTTGGTTCTTGTCATATTCTAAGGGAGATTGATGTAAGTGGCTCCACTCCAGCTTACAGAccCTAGTGTAACTGTTTCTTCTTCAAGGTGATTTGCATTTTATTCCTGAATGCCTGAGGGTTCTTT
-

ikzf1_example_3.fa

->del4-8__jonction_intron3_3UTR
-TGTGAAGGTCACACCCTCTGGTCTTCTCCCAGCCCATAGGGTATAAATAATCTGAATTGACGGCATCCAGGGATCTCAGAAATTATTAGTACATCCggGTGGGCTGACATGCTGGCTCTCTTCCCTGTATGCCGAGACATGCTTGGGATCTCCTAGCTCCACACTCTGTCTCTCATGAGTCTGAGCCCTTTGGGTTTCTGTGACTTCCAGTCCCC
-

ikzf1_example_4.fa

->del2-8__jonction_intron1_3UTR
-CAACAAGTGACCCATCCTTTGAAGCTTACAAGAAGAGAAACATTAATCTATTTCACGTCTTGAAAACAGATCAGTTTTATTTTGCTCAAAAAGGGCACATGTACATTTTTGATCTAGGTCTTAGAAACGTAGAGTTTCAGttctaaGGCTGACATGCTGGCTCTCTTCCCTGTATGCCGAGACATGCTTGGGATCTCCTAGCTCCACACTCTGTCTCTCATGAGTCTGAGCCCTTTGGGTTTCTGTGACTTCCAGTCCCC