chore: remove redundant bnptdms from dictionary

bnptdms was added alongside nptdms in the initial cspell commit when
both were flagged from the regex r\bnptdms\b in test_examples.py.
With nptdms in the dictionary, bnptdms is silently accepted via
compound splitting (b + nptdms) and the explicit entry is unnecessary.

Author: KostaIlic2

.cspell/cspell-dict.txt

@@ -64,7 +64,6 @@ nitypes
 hightime
 
 # nptdms
-bnptdms
 nptdms
 
 # ctypes (stdlib)