fix: remove contraction expansions from whitelist to prevent word splitting (#290) (#339)

Remove here's/Here's, you're/You're, i'm/I'm from tts.tsv. These
entries caused words like "where's" and "there's" to be split
(e.g. "where's" → "w here is") because the whitelist matched from
the middle of a word.

Author: pengzhendong

tn/english/data/whitelist/tts.tsv

@@ -3048,9 +3048,3 @@ Z. Y.	ZY
 Z.Y.	ZY
 Z. Z.	ZZ
 Z.Z.	ZZ
-here's	here is
-you're	you are
-i'm	i am
-Here's	Here is
-You're	You are
-I'm	I am