Fix the standard and xo handlers so they call the eslint function

ale_linters/javascript/standard.vim

@@ -17,35 +17,10 @@ function! ale_linters#javascript#standard#GetCommand(buffer) abort
     \   . ' --stdin %s'
 endfunction
 
-function! ale_linters#javascript#standard#Handle(buffer, lines) abort
-    " Matches patterns line the following:
-    "
-    " /path/to/some-filename.js:47:14: Strings must use singlequote.
-    " /path/to/some-filename.js:56:41: Expected indentation of 2 spaces but found 4.
-    " /path/to/some-filename.js:13:3: Parsing error: Unexpected token
-    let l:pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\)$'
-    let l:output = []
-
-    for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        let l:type = 'Error'
-        let l:text = l:match[3]
-
-        call add(l:output, {
-        \   'bufnr': a:buffer,
-        \   'lnum': l:match[1] + 0,
-        \   'col': l:match[2] + 0,
-        \   'text': l:text,
-        \   'type': 'E',
-        \})
-    endfor
-
-    return l:output
-endfunction
-
+" standard uses eslint and the output format is the same
 call ale#linter#Define('javascript', {
 \   'name': 'standard',
 \   'executable_callback': 'ale_linters#javascript#standard#GetExecutable',
 \   'command_callback': 'ale_linters#javascript#standard#GetCommand',
-\   'callback': 'ale_linters#javascript#standard#Handle',
+\   'callback': 'ale#handlers#eslint#Handle',
 \})
-

ale_linters/javascript/xo.vim

@@ -17,14 +17,10 @@ function! ale_linters#javascript#xo#GetCommand(buffer) abort
     \   . ' --reporter unix --stdin --stdin-filename %s'
 endfunction
 
-function! ale_linters#javascript#xo#Handle(buffer, lines) abort
-    " xo uses eslint and the output format is the same
-    return ale_linters#javascript#eslint#Handle(a:buffer, a:lines)
-endfunction
-
+" xo uses eslint and the output format is the same
 call ale#linter#Define('javascript', {
 \   'name': 'xo',
 \   'executable_callback': 'ale_linters#javascript#xo#GetExecutable',
 \   'command_callback': 'ale_linters#javascript#xo#GetCommand',
-\   'callback': 'ale_linters#javascript#xo#Handle',
+\   'callback': 'ale#handlers#eslint#Handle',
 \})