fix: Fix lint errors

src/parsers/index.ts

@@ -8,7 +8,7 @@ import {
   WINDOW_WIDTH,
 } from '../constants';
 
-import {first, last, second} from '../lenses';
+import {first, second} from '../lenses';
 
 // unwrap first element of the string array
 const firstString = first<string>();
@@ -18,10 +18,6 @@ const fst = compose(defaultTo(''), view(firstString));
 const secondString = second<string>();
 const snd = compose(defaultTo(''), view(secondString));
 
-const lastString = last<string>();
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-const lst = compose(defaultTo(''), view(lastString));
-
 // extract sentences naively splitting by delimiters
 const sentencePattern = `([^${SENTENCE_END_MARKERS}]*?[${SENTENCE_END_MARKERS}]+)`;
 const senteceFlags = 'gmu';