removed rewinding rows in parser

spec/std/csv/csv_parse_spec.cr

@@ -72,15 +72,12 @@ describe CSV do
     end
 
     it "parses to hashes remaining rows" do
-      csv_text = "Index,Customer Id,First Name,Last Name\n1,DD37Cf93aecA6Dc,Sheryl,Baxter\n2,1Ef7b82A4CAAD10,Preston,Lozano\n3,6F94879bDAfE5a6,,Berry"
+      csv_text = "Index,Customer Id,First Name,Last Name\n1,DD37Cf93aecA6Dc,Sheryl,Baxter\n2,1Ef7b82A4CAAD10,Preston,Lozano"
       parser = CSV::Parser.new(csv_text)
-      # skip header
-      parser.next_row
-      # skip rows
-      parser.next_row
+
       parser.next_row
 
-      parser.parse_to_h.should eq([{"Index" => "3", "Customer Id" => "6F94879bDAfE5a6", "First Name" => "", "Last Name" => "Berry"}])
+      parser.parse_to_h.should eq([{"1" => "2", "DD37Cf93aecA6Dc" => "1Ef7b82A4CAAD10", "Sheryl" => "Preston", "Baxter" => "Lozano"}])
     end
 
     it "raises if single quote in the middle" do

src/csv/lexer.cr

@@ -29,9 +29,6 @@ abstract class CSV::Lexer
   getter separator : Char
   getter quote_char : Char
 
-  # :nodoc:
-  protected getter line_number : Int32
-
   # :nodoc:
   def initialize(@separator : Char = DEFAULT_SEPARATOR, @quote_char : Char = DEFAULT_QUOTE_CHAR)
     @token = Token.new

src/csv/parser.cr

@@ -21,14 +21,8 @@ class CSV::Parser
 
   def parse_to_h : Array(Hash(String, String))
     rows = [] of Hash(String, String)
-    row_number = @lexer.line_number
-
-    rewind
     if headers = next_row
-      while @lexer.line_number < row_number
-        next_row
-      end
-      each_row do |row|
+      while row = next_row
         if parsed_row = parse_row_to_h_internal(headers, row)
           rows << parsed_row
         end