[ruby/prism] Remove restrict to fix windows 2015

ruby/prism@f0a2ce1c0e

Author: kddnewton

prism/extension.c

@@ -756,7 +756,7 @@ parse(int argc, VALUE *argv, VALUE self) {
  * An implementation of fgets that is suitable for use with Ruby IO objects.
  */
 static char *
-parse_stream_fgets(char *restrict string, int size, void *restrict stream) {
+parse_stream_fgets(char *string, int size, void *stream) {
     RUBY_ASSERT(size > 0);
 
     VALUE line = rb_funcall((VALUE) stream, rb_intern("gets"), 1, INT2FIX(size - 1));

prism/prism.h

@@ -84,7 +84,7 @@ PRISM_EXPORTED_FUNCTION pm_node_t * pm_parse(pm_parser_t *parser);
  * stream. It closely mirrors that of fgets so that fgets can be used as the
  * default implementation.
  */
-typedef char * (pm_parse_stream_fgets_t)(char *restrict string, int size, void *restrict stream);
+typedef char * (pm_parse_stream_fgets_t)(char *string, int size, void *stream);
 
 /**
  * Parse a stream of Ruby source and return the tree.