removed rxns comments that started with the word fit

[NellyMitnik]

I got the following trace when simulating an RMG-genrated Chemkin file usng RMG's constant T/P reactor:

[/tmp/ipykernel_1667806/515436996.py](https://file+.vscode-resource.vscode-cdn.net/tmp/ipykernel_1667806/515436996.py) in 
      1 species, reactions = load_chemkin_file(path=chemkin_path,
----> 2                                        dictionary_path=dict_path
      3                                       )

[~/Code/RMG-Py/rmgpy/chemkin.pyx](https://file+.vscode-resource.vscode-cdn.net/home/nelly/Code/scripts/NPS/~/Code/RMG-Py/rmgpy/chemkin.pyx) in rmgpy.chemkin.load_chemkin_file()

[~/Code/RMG-Py/rmgpy/chemkin.pyx](https://file+.vscode-resource.vscode-cdn.net/home/nelly/Code/scripts/NPS/~/Code/RMG-Py/rmgpy/chemkin.pyx) in rmgpy.chemkin.load_chemkin_file()

[~/Code/RMG-Py/rmgpy/chemkin.pyx](https://file+.vscode-resource.vscode-cdn.net/home/nelly/Code/scripts/NPS/~/Code/RMG-Py/rmgpy/chemkin.pyx) in rmgpy.chemkin.read_reactions_block()

[~/Code/RMG-Py/rmgpy/chemkin.pyx](https://file+.vscode-resource.vscode-cdn.net/home/nelly/Code/scripts/NPS/~/Code/RMG-Py/rmgpy/chemkin.pyx) in rmgpy.chemkin.read_reactions_block()

[~/Code/RMG-Py/rmgpy/chemkin.pyx](https://file+.vscode-resource.vscode-cdn.net/home/nelly/Code/scripts/NPS/~/Code/RMG-Py/rmgpy/chemkin.pyx) in rmgpy.chemkin.read_reaction_comments()

ChemkinError: Unexpected species identifier fit encountered in flux pairs for reaction VA(28) + C6H5(126) <=> W1-2(1174).

RMG did not read the flux pair correctly from C6H5_C4H4_Mebel kinetic library, and read the following line which was taken from the library comment.

This is the reaction it errored on:

! Library reaction: C6H5_C4H4_Mebel
! Flux pairs: VA(28), W1-2(1174); C6H5(126), W1-2(1174); 
! fit btw. 500 and 1375 K with MAE of 1.9%, 4.6%
! fit btw. 500 and 1650 K with MAE of 2.8%, 6.0%
! fit btw. 500 and 1800 K with MAE of 2.5%, 4.6%
! fit btw. 500 and 2250 K with MAE of 3.7%, 12.1%
VA(28)+C6H5(126)=W1-2(1174)                         1.000e+00 0.000     0.000    
    PLOG/ 0.039470  3.620e+84 -21.480   42.190   /
    PLOG/ 0.039470  2.160e+43 -10.070   12.890   /
    PLOG/ 1.000000  2.630e+69 -16.520   40.770   /
    PLOG/ 1.000000  2.890e+26 -4.680    7.584    /
    PLOG/ 10.000000 7.590e+49 -10.650   32.900   /
    PLOG/ 10.000000 1.040e+17 -1.720    4.254    /
    PLOG/ 100.000000 1.350e+27 -4.110    18.320   /
    PLOG/ 100.000000 1.270e+20 -2.720    5.193    /

For a quick solution while using rmg.chemkin.load_chemkin_file, I removed all the comments inside the reactions comments that started with the word 'fit' inside the C6H5_C4H4_Mebel library.

[NellyMitnik]

I am attaching the chemkin and the dictionary files:
chem_edge_annotated.txt
species_edge_dictionary.txt