Remove fungi schemes with diploid/ambig codes

[tseemann]

Ambiguous DNA:

tvaginalis/FT2A.tfa     1
tvaginalis/SHMT.tfa     1
ckrusei/HIS3.tfa        29
ckrusei/ADE2.tfa        37
ckrusei/LEU2.tfa        44
ckrusei/NMT1.tfa        49
ckrusei/LYS2D.tfa       50
ckrusei/TRP1.tfa        74
ctropicalis/ZWF1a.tfa   105
ctropicalis/ICL1.tfa    121
ctropicalis/SAPT2.tfa   152
calbicans/ACC1.tfa      192
ctropicalis/SAPT4.tfa   227
calbicans/MPIb.tfa      332
calbicans/AAT1a.tfa     369
calbicans/ADP1.tfa      379
ctropicalis/MDR1.tfa    471
ctropicalis/XYR1.tfa    539
calbicans/SYA1.tfa      588
calbicans/ZWF1b.tfa     620
calbicans/VPS13.tfa     714