Remove unneeded lookBack function

src_v2/parser/parser_internals.nim

@@ -18,20 +18,6 @@ type parserFnT = proc(t0: Parser): ParserResult
 
 # -- Utilities
 
-proc lookBack*(count: int): (parserFnT) =
-  return proc(parser: Parser): ParserResult =
-    let state = parser.state
-    let newIndex = state.position - 1
-
-    Parser(
-      state: ParserState(
-        stream: state.stream,
-        position: newIndex,
-        lastPosition: parser.state.position,
-      ),
-      tokens: parser.tokens,
-    ).ok()
-
 proc isStreamCompleted*(parser: Parser): bool =
   parser.state.position >= parser.state.stream.len - 1