Disable the use of cost cutoffs in the English dict.

[linas]

Per discussions in #1453

[ampli]

For some reason, this PR causes the ru parsing not to work at all.

[ampli]

It seems that now ru needs at least cost-max=6 to work. But with any cost-max it doesn't work as intended, and these sentences are now parsed incorrectly:

<  *это тестами
<  *это тестом
<  *это тестями
<  прежде всего , требуется определить само понятие жизни .
<  скорее всего , дракон несет свою обычную стражу .

[linas]

If russian does not work, then it is not due to this PR, but to #1456 ... fixed in #1458