Drop windows path separators from vimrc regex

Per PR review

Author: LunarWatcher

assets/json/pattern.json

@@ -7,7 +7,7 @@
   ".*materialize.*\\.js$": "",
   ".*mootools.*\\.js$": "",
   ".*require.*\\.js$": "",
-  ".*vimrc[^/\\\\]*$": "",
+  ".*vimrc[^/]*$": "",
   "/Contacts\\.$": "󰉌",
   "/Desktop\\.$": "",
   "/Downloads\\.$": "󰉍",

test/nerdfont/path/pattern.vimspec

@@ -20,11 +20,6 @@ Describe nerdfont#path#pattern
       Assert Equals(glyph, '')
     End
 
-    It returns a Vagrant glyph for 'Vagrantfile' stored under a Windows vimrc path
-      let glyph = nerdfont#path#pattern#find('vimrc-modules\Vagrantfile')
-      Assert Equals(glyph, '')
-    End
-
     It returns a Vim glyph for vimrc patterns
       let glyph = nerdfont#path#pattern#find('vimrc-whatever')
       Assert Equals(glyph, '')